Convert 87% to a Fraction: Finding the Equivalent Over 100

Percentage Conversion with Standard Denominator

Write the percentage 87% as a fraction with a denominator of 100.

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Convert from percentages to a fractions
00:05 The percentage equals a fraction where the numerator is the percentage (X) and the denominator is 100
00:10 Apply this formula to our exercise
00:20 Here is the solution

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

Write the percentage 87% as a fraction with a denominator of 100.

2

Step-by-step solution

We use the formula:

x100=x% \frac{x}{100}=x\%

87100=87% \frac{87}{100}=87\%

3

Final Answer

87100 \frac{87}{100}

Key Points to Remember

Essential concepts to master this topic
  • Definition: Any percentage equals that number over 100
  • Formula: x%=x100 x\% = \frac{x}{100} , so 87%=87100 87\% = \frac{87}{100}
  • Check: Convert back: 87100=0.87=87% \frac{87}{100} = 0.87 = 87\%

Common Mistakes

Avoid these frequent errors
  • Writing decimal numbers in the numerator
    Don't write 8.7100 \frac{8.7}{100} = wrong format! Fractions should have whole numbers in numerator and denominator when possible. Always use the percentage number directly as numerator: 87%=87100 87\% = \frac{87}{100} .

Practice Quiz

Test your knowledge with interactive questions

Convert the fraction into a percentage:

\( \frac{2}{100}=\text{?} \)

FAQ

Everything you need to know about this question

Why is the denominator always 100 for percentages?

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Percent literally means "per hundred"! The word comes from Latin per centum. So 87% 87\% means 87 out of every 100 parts.

Can I simplify 87100 \frac{87}{100} further?

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Check if 87 and 100 share any common factors. Since 87 = 3 × 29 and 100 = 2² × 5², they share no common factors, so 87100 \frac{87}{100} is already in lowest terms.

What if I see 8.7100 \frac{8.7}{100} as an answer choice?

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That's incorrect because fractions traditionally use whole numbers. While 8.7100 \frac{8.7}{100} equals the same decimal value, the proper fraction form is 87100 \frac{87}{100} .

How do I convert any percentage to a fraction over 100?

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Simple pattern: Just drop the % sign and put that number over 100! Examples: 25%=25100 25\% = \frac{25}{100} , 3%=3100 3\% = \frac{3}{100}

Is there a difference between 87% and 0.87?

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They represent the same value in different forms! 87%=87100=0.87 87\% = \frac{87}{100} = 0.87 . Percentages, fractions, and decimals are just different ways to express the same number.

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