Changing a decimal to a percent is done in 2 steps, based on the idea of multiplication by 100. Multiplication by 100 is the same as moving the decimal point two digits to the right.

0.20 = ? %

- Move the decimal point two places to the right
- Remove the % symbol

Percents can be greater than 100%. Since 1 = 1.00 = 100%, we would expect 1.5 to be greater than 100%. In fact, 1.5 = 150%.