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What Does Percent Chance Mean?: Activity 2 of 3

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Another way to talk about probability is by using percents. Percent means "out of 100." Instead of describing a probability as 1 out of 4, we say 25% (which means 25 out of 100).

Here's how to do the math:

  1. "1 out of 4" = 1/4
  2. Divide the top number by the bottom number 1 ÷ 4 = 0.25
  3. Then, move the decimal 2 places to the right and add the percent sign

0.25 = 25%

 

Jill and Ted read that in Black Creek County the sun shines 9 out of 10 days in July. They plan to get married July 22. What is the percent chance that their wedding day will be sunny?

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Question 4 of 8