Finding 84 as a Percentage of x

Oct 13, 2025 by wbrum.org 30 views

Introduction

In mathematics, percentages are a way to express a value as a fraction of 100. When we say that 84 is $140\%$ of another number, it means that 84 is 140% of that number. In this article, we will explore how to find the other number and express 84 as a percentage of that number.

Understanding the Problem

Let's assume that the other number is x. We are given that 84 is $140\%$ of x. To find x, we can set up an equation based on this information.

Setting Up the Equation

We know that 84 is $140\%$ of x, so we can write the equation as:

84 = (140/100) * x

Simplifying the Equation

To simplify the equation, we can multiply both sides by 100 to get rid of the fraction:

8400 = 140x

Solving for x

Now, we can solve for x by dividing both sides by 140:

x = 8400 / 140

x = 60

Finding 84 as a Percentage of x

Now that we know x is 60, we can find 84 as a percentage of x. To do this, we can divide 84 by x and multiply by 100:

(84 / 60) * 100 = 140%

Conclusion

In this article, we explored how to find the other number when 84 is $140\%$ of that number. We set up an equation, simplified it, and solved for x. We then found 84 as a percentage of x, which is 140%. This problem is a great example of how to work with percentages and solve for unknown values.

Real-World Applications

This problem has many real-world applications, such as:

Finding the original price of an item based on a discount
Calculating the cost of a product based on a percentage increase
Determining the value of a stock based on its percentage change

Tips and Tricks

Here are some tips and tricks to help you solve similar problems:

Always read the problem carefully and understand what is being asked
Set up an equation based on the information given
Simplify the equation by multiplying or dividing both sides by the same value
Solve for the unknown value by dividing both sides by the coefficient
Check your answer by plugging it back into the original equation

Examples and Exercises

Here are some examples and exercises to help you practice solving similar problems:

Example 1: 72 is $120\%$ of x. Find x and express 72 as a percentage of x.
Exercise 1: 96 is $150\%$ of x. Find x and express 96 as a percentage of x.
Example 2: 108 is $180\%$ of x. Find x and express 108 as a percentage of x.
Exercise 2: 120 is $200\%$ of x. Find x and express 120 as a percentage of x.

Conclusion

In conclusion, finding 84 as a percentage of another number when 84 is $140\%$ of that number is a simple problem that requires setting up an equation, simplifying it, and solving for the unknown value. This problem has many real-world applications and can be solved using the tips and tricks provided in this article. With practice, you can become proficient in solving similar problems and apply them to real-world scenarios.

Introduction

In our previous article, we explored how to find the other number when 84 is $140\%$ of that number. We set up an equation, simplified it, and solved for x. We then found 84 as a percentage of x, which is 140%. In this article, we will answer some frequently asked questions related to this topic.

Q&A

Q: What is the formula to find the other number when a value is a percentage of that number?

A: The formula to find the other number is:

x = (value / percentage) * 100

Q: How do I set up an equation when a value is a percentage of another number?

A: To set up an equation, you can use the formula:

value = (percentage / 100) * x

Q: What if the percentage is not a whole number, such as 34.5%?

A: If the percentage is not a whole number, you can simply plug it into the formula:

value = (percentage / 100) * x

Q: Can I use this method to find the other number when a value is a negative percentage of another number?

A: Yes, you can use this method to find the other number when a value is a negative percentage of another number. However, you will need to take into account the negative sign when setting up the equation.

Q: How do I find the percentage of a value when I know the other number?

A: To find the percentage of a value, you can use the formula:

percentage = (value / x) * 100

Q: What if I have a decimal value, such as 0.75, and I want to find the percentage of that value?

A: If you have a decimal value, you can simply plug it into the formula:

percentage = (value / x) * 100

Q: Can I use this method to find the percentage of a value when the other number is a decimal value?

A: Yes, you can use this method to find the percentage of a value when the other number is a decimal value. However, you will need to take into account the decimal value when setting up the equation.

Examples and Exercises

Here are some examples and exercises to help you practice solving similar problems:

Example 1: 72 is $120\%$ of x. Find x and express 72 as a percentage of x.
Exercise 1: 96 is $150\%$ of x. Find x and express 96 as a percentage of x.
Example 2: 108 is $180\%$ of x. Find x and express 108 as a percentage of x.
Exercise 2: 120 is $200\%$ of x. Find x and express 120 as a percentage of x.

Tips and Tricks

Here are some tips and tricks to help you solve similar problems:

Always read the problem carefully and understand what is being asked
Set up an equation based on the information given
Simplify the equation by multiplying or dividing both sides by the same value
Solve for the unknown value by dividing both sides by the coefficient
Check your answer by plugging it back into the original equation

Conclusion

Additional Resources

Here are some additional resources to help you learn more about percentages and solving equations:

Khan Academy: Percentages and Solving Equations
Mathway: Percentages and Solving Equations
Wolfram Alpha: Percentages and Solving Equations

Final Thoughts

In this article, we answered some frequently asked questions related to finding 84 as a percentage of another number. We provided examples and exercises to help you practice solving similar problems. We also provided tips and tricks to help you solve similar problems. With practice and patience, you can become proficient in solving similar problems and apply them to real-world scenarios.