We use the ( % ) symbol instead of writing fractions with a denominator of 100.

Let’s change 0.62 to a percent! × = 62 Don’t forget the percent sign! 62%

Notice when you multiply by 100, it’s just like moving the decimal point 2 places to the right! Don’t forget to add the percent sign after you move the decimal! = 62% = 62%0.62

0.45 = 45% → Before we can move the decimal 2 places to the right, we have to add a zero. Example : 0 → 70.0 = 70%

00 Example : 1.25 → = 125% Example : 2 Add two zeros so we can move the decimal! → = 200%

Change the following decimals into percentages.

If we move the decimal 2 places to the right to change a decimal to a percent, what do you suppose we do to change a percent back to a decimal? Move the decimal 2 places to the left!

% % Example 1 : 85 Add the “understood” decimal after the 5 and remove the percent sign. % →.85 = 0.85 Example 2 : 30 →.30 = 0.3 Example 3 : 115 = 1.15

Change the following percents into decimals.