Expressing Fractions as Percentages

Oct 13, 2025 by wbrum.org 106 views

Expressing Fractions as Percentages

In mathematics, percentages are a way to express a value as a fraction of 100. To express a fraction as a percentage, we need to divide the numerator by the denominator and multiply by 100.

Expressing the Fraction $\frac{15}{50}$ as a Percentage

To express the fraction $\frac{15}{50}$ as a percentage, we can follow these steps:

Divide the numerator (15) by the denominator (50): $\frac{15}{50} = 0.3$
Multiply the result by 100: $0.3 \times 100 = 30\%$

Therefore, the fraction $\frac{15}{50}$ can be expressed as a percentage: 30%.

Expressing Other Fractions as Percentages

We can use the same steps to express other fractions as percentages. For example, to express the fraction $\frac{25}{100}$ as a percentage, we can follow these steps:

Divide the numerator (25) by the denominator (100): $\frac{25}{100} = 0.25$
Multiply the result by 100: $0.25 \times 100 = 25\%$

Therefore, the fraction $\frac{25}{100}$ can be expressed as a percentage: 25%.

Performing Fraction Operations

In mathematics, we can perform various operations on fractions, including addition, subtraction, multiplication, and division.

Adding and Subtracting Fractions

To add or subtract fractions, we need to have the same denominator. If the denominators are different, we can find the least common multiple (LCM) of the denominators and convert both fractions to have the LCM as the denominator.

Adding $2 \frac{2}{3}$ and $4 \frac{3}{5}$

To add $2 \frac{2}{3}$ and $4 \frac{3}{5}$ , we can follow these steps:

Convert the mixed numbers to improper fractions: $2 \frac{2}{3} = \frac{8}{3}$ and $4 \frac{3}{5} = \frac{23}{5}$
Find the LCM of the denominators (3 and 5): LCM(3, 5) = 15
Convert both fractions to have the LCM as the denominator: $\frac{8}{3} = \frac{8 \times 5}{3 \times 5} = \frac{40}{15}$ and $\frac{23}{5} = \frac{23 \times 3}{5 \times 3} = \frac{69}{15}$
Add the fractions: $\frac{40}{15} + \frac{69}{15} = \frac{109}{15}$

Therefore, the result of adding $2 \frac{2}{3}$ and $4 \frac{3}{5}$ is: $6 \frac{14}{15}$

Subtracting $\frac{3}{4}$ from $\frac{4}{6}$

To subtract $\frac{3}{4}$ from $\frac{4}{6}$ , we can follow these steps:

Find the LCM of the denominators (4 and 6): LCM(4, 6) = 12
Convert both fractions to have the LCM as the denominator: $\frac{3}{4} = \frac{3 \times 3}{4 \times 3} = \frac{9}{12}$ and $\frac{4}{6} = \frac{4 \times 2}{6 \times 2} = \frac{8}{12}$
Subtract the fractions: $\frac{8}{12} - \frac{9}{12} = \frac{-1}{12}$

Therefore, the result of subtracting $\frac{3}{4}$ from $\frac{4}{6}$ is: $-\frac{1}{12}$

Multiplying and Dividing Fractions

To multiply or divide fractions, we can follow these steps:

Multiplying $\frac{3}{4}$ and $\frac{4}{6}$

To multiply $\frac{3}{4}$ and $\frac{4}{6}$ , we can follow these steps:

Multiply the numerators: $3 \times 4 = 12$
Multiply the denominators: $4 \times 6 = 24$
Write the result as a fraction: $\frac{12}{24}$

Therefore, the result of multiplying $\frac{3}{4}$ and $\frac{4}{6}$ is: $\frac{1}{2}$

Dividing $\frac{3}{4}$ by $\frac{4}{6}$

To divide $\frac{3}{4}$ by $\frac{4}{6}$ , we can follow these steps:

Invert the second fraction: $\frac{4}{6} = \frac{6}{4}$
Multiply the fractions: $\frac{3}{4} \times \frac{6}{4} = \frac{18}{16}$

Therefore, the result of dividing $\frac{3}{4}$ by $\frac{4}{6}$ is: $\frac{9}{8}$

Conclusion

$In this article, we have discussed how to express fractions as percentages and how to perform various operations on fractions, including addition, subtraction, multiplication, and division. We have also provided examples of how to apply these concepts to solve problems. By following the steps outlined in this article, you should be able to express fractions as percentages and perform fraction operations with ease.<br/> **Frequently Asked Questions (FAQs) on Expressing Fractions as Percentages and Performing Fraction Operations**$

Q: What is the difference between a fraction and a percentage?

A: A fraction is a way to express a part of a whole as a ratio of two numbers, while a percentage is a way to express a value as a fraction of 100.

Q: How do I express a fraction as a percentage?

A: To express a fraction as a percentage, you need to divide the numerator by the denominator and multiply by 100.

Q: What is the least common multiple (LCM) and how do I find it?

A: The LCM is the smallest number that is a multiple of two or more numbers. To find the LCM, you can list the multiples of each number and find the smallest number that appears in both lists.

Q: How do I add and subtract fractions?

A: To add and subtract fractions, you need to have the same denominator. If the denominators are different, you can find the LCM of the denominators and convert both fractions to have the LCM as the denominator.

Q: How do I multiply and divide fractions?

A: To multiply fractions, you can multiply the numerators and multiply the denominators. To divide fractions, you can invert the second fraction and multiply.

Q: What is the difference between a mixed number and an improper fraction?

A: A mixed number is a combination of a whole number and a fraction, while an improper fraction is a fraction where the numerator is greater than or equal to the denominator.

Q: How do I convert a mixed number to an improper fraction?

A: To convert a mixed number to an improper fraction, you can multiply the whole number by the denominator and add the numerator, then write the result as a fraction with the denominator.

Q: How do I convert an improper fraction to a mixed number?

A: To convert an improper fraction to a mixed number, you can divide the numerator by the denominator and write the result as a whole number and a remainder, then write the remainder as a fraction.

Q: What are some common fraction operations?

A: Some common fraction operations include adding, subtracting, multiplying, and dividing fractions, as well as converting between mixed numbers and improper fractions.

Q: How do I simplify a fraction?

A: To simplify a fraction, you can divide both the numerator and the denominator by their greatest common divisor (GCD).

Q: What is the greatest common divisor (GCD) and how do I find it?

A: The GCD is the largest number that divides two or more numbers without leaving a remainder. To find the GCD, you can list the factors of each number and find the largest number that appears in both lists.

Q: How do I use fractions in real-life situations?

A: Fractions are used in many real-life situations, such as cooking, measuring ingredients, and calculating proportions.

Q: What are some common applications of fractions?

A: Some common applications of fractions include calculating percentages, measuring ingredients, and calculating proportions.

Conclusion

In this article, we have answered some frequently asked questions on expressing fractions as percentages and performing fraction operations. We hope that this article has provided you with a better understanding of fractions and how to use them in real-life situations.