Convert Fraction to Percentage: Solving 2/10 as a Percent

Fraction to Percentage with Decimal Conversion

Calculate 2 over 10 as a percentage:

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Calculate 2 as a percentage of 10
00:05 Apply the formula to calculate percentages
00:10 Divide the number by the second number and multiply by 100
00:19 Break it down into factors and reduce wherever possible
00:59 This is the solution

Step-by-step written solution

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1

Understand the problem

Calculate 2 over 10 as a percentage:

2

Step-by-step solution

To solve the problem of converting the fraction 210 \frac{2}{10} into a percentage, we need to follow these steps:

  • Step 1: Recognize the given fraction, 210 \frac{2}{10} .
  • Step 2: Convert this fraction to a percentage by multiplying by 100, as percentage means "per hundred".
  • Step 3: Simplify the expression to find the percentage.

Now, let's execute these steps:
Step 1: We have 210 \frac{2}{10} .
Step 2: Multiply 210 \frac{2}{10} by 100 to convert it into a percentage:
(210)×100=20010\left(\frac{2}{10}\right) \times 100 = \frac{200}{10}.
Step 3: Simplify 20010\frac{200}{10} to get 20.

Thus, 210 \frac{2}{10} expressed as a percentage is 20% 20\% .

3

Final Answer

20%

Key Points to Remember

Essential concepts to master this topic
  • Rule: Multiply fraction by 100 to convert to percentage
  • Technique: Calculate 210×100=20010=20 \frac{2}{10} \times 100 = \frac{200}{10} = 20
  • Check: Verify 20% equals 0.20 as decimal, same as 210 \frac{2}{10}

Common Mistakes

Avoid these frequent errors
  • Forgetting to multiply by 100
    Don't just divide 2 by 10 to get 0.2 and call it 0.2%! This gives the decimal value, not the percentage. A percentage means 'per hundred', so you need to multiply by 100. Always multiply the fraction by 100 to convert to percentage form.

Practice Quiz

Test your knowledge with interactive questions

Calculate 30 over 100 as a percentage:

FAQ

Everything you need to know about this question

Why do I multiply by 100 to get a percentage?

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The word percentage means 'per hundred'! When you multiply by 100, you're showing how many parts out of 100 your fraction represents. So 210 \frac{2}{10} becomes 20 out of 100, or 20%.

Can I simplify the fraction first?

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Yes! 210=15 \frac{2}{10} = \frac{1}{5} , and 15×100=20 \frac{1}{5} \times 100 = 20 . Either way gives you 20%. Use whichever method feels easier!

How do I remember the difference between decimals and percentages?

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Think of it this way: decimals are parts of 1, while percentages are parts of 100. So 0.2 means 2 tenths, but 20% means 20 out of 100!

What if I get a fraction that doesn't divide evenly?

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No problem! For example, 13×100=33.33... \frac{1}{3} \times 100 = 33.33...% You can round to a reasonable number of decimal places, like 33.3%.

Is there a shortcut for converting tenths to percentages?

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Yes! Since tenths are already out of 10, just multiply the numerator by 10. So 310=30 \frac{3}{10} = 30% , 710=70 \frac{7}{10} = 70% , etc.

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