What is 10% of 100?

10% of 100 = 10

Working: 100 × 0.1 = 10

10 percent of 100 is 10.

To find a percentage of a number, convert the percentage to a decimal by dividing by 100, then multiply. Here that is 10 ÷ 100 = 0.1, and 100 × 0.1 = 10.

There is usually a faster mental route. Ten percent of 100 is 10 — just move the decimal point one place left. That is the answer directly.

Ten percent is the one percentage worth committing to memory, because it requires no arithmetic at all — the decimal point simply moves one place left. Nearly every mental shortcut for other percentages is built out of it.

One hundred is the amount that makes percentages trivial, because a percentage is literally 'per hundred' — the percentage and the answer are the same number. That is the whole origin of the notation, and working an example at 100 first is the fastest way to sanity-check any other amount.

Other percentages of 100

Percentage	Of 100
15%	15
20%	20
25%	25
30%	30
50%	50

Try another value

Percent (X)

Of value (Y)

20% of 150 is

Frequently asked questions

What is 10 percent of 100?

10% of 100 is 10. Multiply 100 by 0.1 to get the answer.

What is 10% off 100?

Taking 10% off 100 leaves 90. The discount itself is 10, so subtract that from 100 — or multiply 100 by 0.9 to get to the final price in one step.

How do you calculate a percentage of a number?

Divide the percentage by 100 to turn it into a decimal, then multiply that decimal by the number. For example 20% becomes 0.2, and 0.2 multiplied by the number gives the answer.

For any other value, use the full Percentage Calculator on BrainVert.