Percentage Calculator: X Out of Y as a Percent

Type a part and a whole. The percent and every step update as you type.

Part (X)Whole (Y)

16 is 80% of 20

80%

As a fraction: 16/20
Remaining: 20%

16 ÷ 20 = 0.8

0.8 × 100 = 80%

How to turn “X out of Y” into a percentage

Divide the part by the whole, then multiply by 100. For 16 out of 20: 16 ÷ 20 = 0.8, and 0.8 × 100 = 80%.

The same rule answers “14 of 25 is what percent” (56%) and “15 as a percentage of 20” (75%). The whole always goes on the bottom.

How to calculate the percentage of a number

To find X% of Y, turn the percent into a decimal and multiply: 25% of 80 is 0.25 × 80 = 20. For quick X% of Y questions, use the add a percentage calculator or multiply by the decimal on any phone.

Common mistakes

Dividing the whole by the part (20 ÷ 16 = 125%, not 80%).
Forgetting to multiply by 100, which leaves 0.8 instead of 80%.
Rounding too early on repeating decimals such as 2/3 (66.67%).

Quick answers: common scores as percentages

Score	Fraction	Percent
11 out of 15	11/15	73.33%
14 out of 20	14/20	70%
15 out of 20	15/20	75%
16 out of 20	16/20	80%
17 out of 20	17/20	85%
18 out of 20	18/20	90%
14 out of 25	14/25	56%
20 out of 25	20/25	80%
24 out of 30	24/30	80%
25 out of 30	25/30	83.33%

Questions people ask

What is 16 out of 20 as a percentage?

16 ÷ 20 = 0.8, so 16 out of 20 is 80%.

What is 24/30 as a percentage?

24 ÷ 30 = 0.8, so 24/30 is 80%.

What is 11 out of 15 as a percentage?

11 ÷ 15 = 0.7333…, so 11 out of 15 is about 73.33%.

What percent of 42 is 29.4?

29.4 ÷ 42 = 0.7, so 29.4 is 70% of 42.