Multiplying Fractions with Different Denominators

Oct 13, 2025 by wbrum.org 32 views

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Introduction

Multiplying fractions is a fundamental concept in mathematics that can seem daunting at first, but with a clear understanding of the steps involved, it becomes a straightforward process. In this article, we will explore the concept of multiplying fractions, provide a step-by-step guide on how to do it, and apply this knowledge to solve a specific problem.

What are Fractions?

A fraction is a way of expressing a part of a whole as a ratio of two numbers. It consists of a numerator (the top number) and a denominator (the bottom number). For example, the fraction 3/4 represents 3 parts out of a total of 4 parts.

Multiplying Fractions

When multiplying fractions, we multiply the numerators together to get the new numerator, and multiply the denominators together to get the new denominator. This is based on the principle that when we multiply two fractions, we are essentially finding the area of a rectangle with the two fractions as its dimensions.

Example

Let's consider the example of multiplying 1/2 and 3/4.

Multiply the numerators: 1 × 3 = 3
Multiply the denominators: 2 × 4 = 8
Write the result as a fraction: 3/8

Multiplying Fractions with Different Denominators

When multiplying fractions with different denominators, we need to find the least common multiple (LCM) of the two denominators. The LCM is the smallest number that both denominators can divide into evenly.

Example

Let's consider the example of multiplying 1/3 and 2/5.

Find the LCM of 3 and 5: 15
Multiply the numerators: 1 × 2 = 2
Multiply the denominators: 3 × 5 = 15
Write the result as a fraction: 2/15

Multiplying Fractions with Zero

When multiplying fractions, if either the numerator or the denominator is zero, the result is zero.

Example

Let's consider the example of multiplying 1/2 and 0/3.

Multiply the numerators: 1 × 0 = 0
Multiply the denominators: 2 × 3 = 6
Write the result as a fraction: 0/6

Multiplying Fractions with Negative Numbers

When multiplying fractions, if either the numerator or the denominator is negative, the result is negative.

Example

Let's consider the example of multiplying -1/2 and 3/4.

Multiply the numerators: -1 × 3 = -3
Multiply the denominators: 2 × 4 = 8
Write the result as a fraction: -3/8

Solving the Problem

Now that we have a clear understanding of how to multiply fractions, let's apply this knowledge to solve the problem presented at the beginning of this article.

Problem

Find the product of 6/9 and 6/10.

Multiply the numerators: 6 × 6 = 36
Multiply the denominators: 9 × 10 = 90
Write the result as a fraction: 36/90

Simplifying the Result

To simplify the result, we need to find the greatest common divisor (GCD) of the numerator and the denominator. The GCD is the largest number that both the numerator and the denominator can divide into evenly.

Example

Let's consider the example of simplifying the fraction 36/90.

Find the GCD of 36 and 90: 18
Divide the numerator and the denominator by the GCD: 36 ÷ 18 = 2, 90 ÷ 18 = 5
Write the result as a simplified fraction: 2/5

Conclusion

Multiplying fractions is a fundamental concept in mathematics that can seem daunting at first, but with a clear understanding of the steps involved, it becomes a straightforward process. By following the steps outlined in this article, you can confidently multiply fractions and solve problems involving fractions. Remember to always simplify the result by finding the greatest common divisor of the numerator and the denominator.

Frequently Asked Questions

Q: What is the product of 1/2 and 3/4?

A: The product of 1/2 and 3/4 is 3/8.

Q: What is the product of 1/3 and 2/5?

A: The product of 1/3 and 2/5 is 2/15.

Q: What is the product of -1/2 and 3/4?

A: The product of -1/2 and 3/4 is -3/8.

Q: How do I simplify a fraction?

A: To simplify a fraction, find the greatest common divisor (GCD) of the numerator and the denominator, and divide both numbers by the GCD.

Q: What is the product of 6/9 and 6/10?

A: The product of 6/9 and 6/10 is 36/90, which simplifies to 2/5.

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Introduction

Multiplying fractions can be a challenging concept for many students, but with a clear understanding of the steps involved, it becomes a straightforward process. In this article, we will address some of the most frequently asked questions about multiplying fractions, providing detailed explanations and examples to help you better understand the concept.

Q: What is the product of 1/2 and 3/4?

A: The product of 1/2 and 3/4 is 3/8.

Explanation

To find the product of 1/2 and 3/4, we multiply the numerators together to get the new numerator, and multiply the denominators together to get the new denominator.

Multiply the numerators: 1 × 3 = 3
Multiply the denominators: 2 × 4 = 8
Write the result as a fraction: 3/8

Q: What is the product of 1/3 and 2/5?

A: The product of 1/3 and 2/5 is 2/15.

Explanation

To find the product of 1/3 and 2/5, we multiply the numerators together to get the new numerator, and multiply the denominators together to get the new denominator.

Multiply the numerators: 1 × 2 = 2
Multiply the denominators: 3 × 5 = 15
Write the result as a fraction: 2/15

Q: What is the product of -1/2 and 3/4?

A: The product of -1/2 and 3/4 is -3/8.

Explanation

To find the product of -1/2 and 3/4, we multiply the numerators together to get the new numerator, and multiply the denominators together to get the new denominator.

Multiply the numerators: -1 × 3 = -3
Multiply the denominators: 2 × 4 = 8
Write the result as a fraction: -3/8

Q: How do I simplify a fraction?

A: To simplify a fraction, find the greatest common divisor (GCD) of the numerator and the denominator, and divide both numbers by the GCD.

Example

Let's consider the fraction 36/90.

Find the GCD of 36 and 90: 18
Divide the numerator and the denominator by the GCD: 36 ÷ 18 = 2, 90 ÷ 18 = 5
Write the result as a simplified fraction: 2/5

Q: What is the product of 6/9 and 6/10?

A: The product of 6/9 and 6/10 is 36/90, which simplifies to 2/5.

Explanation

To find the product of 6/9 and 6/10, we multiply the numerators together to get the new numerator, and multiply the denominators together to get the new denominator.

Multiply the numerators: 6 × 6 = 36
Multiply the denominators: 9 × 10 = 90
Write the result as a fraction: 36/90
Simplify the fraction by finding the GCD of 36 and 90: 18
Divide the numerator and the denominator by the GCD: 36 ÷ 18 = 2, 90 ÷ 18 = 5
Write the result as a simplified fraction: 2/5

Q: Can I multiply a fraction by a whole number?

A: Yes, you can multiply a fraction by a whole number. To do this, simply multiply the numerator of the fraction by the whole number, and keep the denominator the same.

Example

Let's consider the fraction 1/2 and the whole number 3.

Multiply the numerator by the whole number: 1 × 3 = 3
Keep the denominator the same: 2
Write the result as a fraction: 3/2

Q: Can I multiply two fractions with different denominators?

A: Yes, you can multiply two fractions with different denominators. To do this, find the least common multiple (LCM) of the two denominators, and multiply the numerators together to get the new numerator, and multiply the denominators together to get the new denominator.

Example

Let's consider the fractions 1/3 and 2/5.

Find the LCM of 3 and 5: 15
Multiply the numerators: 1 × 2 = 2
Multiply the denominators: 3 × 5 = 15
Write the result as a fraction: 2/15

Q: Can I multiply a fraction by a negative number?

A: Yes, you can multiply a fraction by a negative number. To do this, simply multiply the numerator and the denominator by the negative number.

Example

Let's consider the fraction 1/2 and the negative number -3.

Multiply the numerator by the negative number: 1 × -3 = -3
Multiply the denominator by the negative number: 2 × -3 = -6
Write the result as a fraction: -3/-6
Simplify the fraction by dividing both the numerator and the denominator by their greatest common divisor: -3/-6 = 1/2

Conclusion

Multiplying fractions can be a challenging concept, but with a clear understanding of the steps involved, it becomes a straightforward process. By following the steps outlined in this article, you can confidently multiply fractions and solve problems involving fractions. Remember to always simplify the result by finding the greatest common divisor of the numerator and the denominator.

Frequently Asked Questions (FAQs)

Q: What is the product of 1/2 and 3/4?

A: The product of 1/2 and 3/4 is 3/8.

Q: What is the product of 1/3 and 2/5?

A: The product of 1/3 and 2/5 is 2/15.

Q: What is the product of -1/2 and 3/4?

A: The product of -1/2 and 3/4 is -3/8.

Q: How do I simplify a fraction?

A: To simplify a fraction, find the greatest common divisor (GCD) of the numerator and the denominator, and divide both numbers by the GCD.

Q: What is the product of 6/9 and 6/10?

A: The product of 6/9 and 6/10 is 36/90, which simplifies to 2/5.

Q: Can I multiply a fraction by a whole number?

A: Yes, you can multiply a fraction by a whole number. To do this, simply multiply the numerator of the fraction by the whole number, and keep the denominator the same.

Q: Can I multiply two fractions with different denominators?

Q: Can I multiply a fraction by a negative number?

A: Yes, you can multiply a fraction by a negative number. To do this, simply multiply the numerator and the denominator by the negative number.