The Percent Equation

The part is to the whole as the percent is to 100.

part whole = percent 100

The whole follows the word of. The part goes with is. The percent has the % sign. Name the missing one, then solve.

1Find the part

What is 30% of 60?

? is the part

30% of itthe full bar is 60

? / 60 = 30 / 100 → part = 18

30 hundredths of the bar. 0.30 × 60.

2Find the percent

12 is what percent of 48?

? is the percent

12 of the 48the full bar is 48

12 / 48 = ? / 100 → 25%

12 out of 48 = 1 out of 4 = 25 out of 100.

3Find the whole

24 is 40% of what number?

? is the whole bar

40% = 24the full bar is ?

24 / ? = 40 / 100 → whole = 60

2 boxes hold 24, so 1 holds 12 and 5 hold 60.

The whole is the full bar.