Divide the numerator by the denominator to change the fraction into a decimal fraction. Then multiply by 100% to change it to percentage.

A decimal fraction is a fraction with the denominator as fractions of ##1/10, 1/100, 1/1000 1/10000 ##

## 9/45 = 1/5 = 0.2 or 2/10 or 20/100##

A percent is a fraction of 100 as a given denominator, so multiply the decimal by 100% moving the decimal point two places to the right.

## 0.2 xx 100%## = 20% see above ##20/100 = 20% ##