Sumwise

What is 20 Percent of 100?

20% of 100 = 20

Result
20
Remaining
80
20% as decimal
0.2
100 + 20%
120

Sumwise · Maintained by Theo Abbott (pen name) · automated checks · Data: exact arithmetic; unit definitions from NIST SP 811 · Updated · How the checks work

How to work it out

  1. Turn the percentage into a decimal: 20 ÷ 100 = 0.2
  2. Multiply: 0.2 × 100 = 20
  3. Check: Work backwards: 20 ÷ 100 × 100 = 20%.

Another method. As a proportion of part to whole: 20/100 = part/100, so part = 20 × 100 ÷ 100 = 20. Both methods always give the same answer.

In a spreadsheet: =20%*100. Forgetting to divide the percentage by 100 makes the answer 100 times too big. Note that x% of y always equals y% of x.

What the result means

20 is the 20% share of 100. The remaining 80% is 80, and the two parts add back up to 100.

Discounts: 20% off an item priced $100 saves $20, so you pay $80.

Adding and taking away 20%

Increasing 100 by 20% gives 120 and decreasing it by 20% gives 80. These do not cancel out: raising 100 by 20% and then lowering the result by 20% ends at 96, because the second 20% is taken of a bigger number.

Related results

Results for nearby numbers
5% of 100

5% of 100 = 5

10% of 100

10% of 100 = 10

15% of 100

15% of 100 = 15

25% of 100

25% of 100 = 25

50% of 100

50% of 100 = 50

75% of 100

75% of 100 = 75

The other way round: 100% of 20. 20% of 100 and 100% of 20 are always equal (both are 20 × 100 ÷ 100 = 20), so you can swap the numbers when one order is easier to work out in your head.

Practice

5% of 35
Show answer

5% of 35 = 1.75

25% of 65
Show answer

25% of 65 = 16.25

27% of 78
Show answer

27% of 78 = 21.06

16% of 41
Show answer

16% of 41 = 6.56

86% of 98
Show answer

86% of 98 = 84.28

33% of 58
Show answer

33% of 58 = 19.14

Calculate another

How answers are calculated and checked: methodology.

Questions

What is 20 Percent of 100?

20% of 100 is 20. Formula, steps and practice examples.

What is 20% off 100?

80. Taking 20% off leaves 80% of 100.

What is 100 plus 20%?

120. Adding 20% is the same as multiplying by 1.2.