What Does Percent Chance Mean?: Activity 2 of 3

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%.  Think of it this way: 25 out of 100 is one quarter of 100, just as 1 is one quarter of 4.

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%

So, let's go back to that coin toss.