Basically all you have to do is to find what the question is telling you and the unit you will get it from the question example: 15 is what percent of 90 so first work out the question then the unit is percent% because they say what percent.
To determine the percent of a number do the following steps:<span>1.Multiply the number by the percent 2.Divide the answer by 100 (Move decimal point two places to the left) 3.<span>Round to the desired precision </span></span>