What is 50% of 100?

50% of 100 = 50

Working: 100 × 0.5 = 50

50 percent of 100 is 50.

To find a percentage of a number, convert the percentage to a decimal by dividing by 100, then multiply. Here that is 50 ÷ 100 = 0.5, and 100 × 0.5 = 50.

There is usually a faster mental route. Ten percent of 100 is 10 — just move the decimal point one place left. Multiply that by 5 to get 50.

Fifty percent is half, and it is the only percentage almost nobody reaches for a calculator to work out. Half-price is retail's most-advertised discount for exactly that reason — the shopper can verify it instantly, which makes the offer feel concrete.

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
10%	10
15%	15
20%	20
25%	25
30%	30

Try another value

Percent (X)

Of value (Y)

20% of 150 is

Frequently asked questions

What is 50 percent of 100?

50% of 100 is 50. Multiply 100 by 0.5 to get the answer.

What is 50% off 100?

Taking 50% off 100 leaves 50. The discount itself is 50, so subtract that from 100 — or multiply 100 by 0.5 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.