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What's a Percent?

Definition: What is a percent?

Summary

  1. The % symbol after the 40 shows that we have a percent
  2. To convert to a fraction, put the number of the percent over 100
  3. 40% as a fraction is 40/100
  4. To convert to a decimal, move the decimal point two places to the left
  5. 40% as a decimal is 0.4

Notes

    1. Use this symbol to show that a number is a percent
    1. We write "forty percent" as "40%"
    1. A percent is just a fraction of 100
    1. When we put the number of the percent over 100, it becomes a fraction
    2. So our example becomes 40/100
    1. Since a decimal is another form of a fraction, we can write percents as decimals too!
    1. Our number here is 40
    1. All whole numbers have an unwritten decimal at the end
    1. To convert to a decimal, just move the decimal point two places to the left
    2. This is also the same as dividing by 100
    1. We can write any percent as a fraction, a decimal, or a number with a percent symbol
    1. A percent is just a number of something per 100