Sumwise

What is 20 Percent of 17?

20% of 17 = 3.4

Result
3.4
Remaining
13.6
20% as decimal
0.2
17 + 20%
20.4

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 × 17 = 3.4
  3. Check: Work backwards: 3.4 ÷ 17 × 100 = 20%.

Another method. As a proportion of part to whole: 20/100 = part/17, so part = 20 × 17 ÷ 100 = 3.4. Both methods always give the same answer.

In a spreadsheet: =20%*17. 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

3.4 is the 20% share of 17. The remaining 80% is 13.6, and the two parts add back up to 17.

Discounts: 20% off an item priced $17 saves $3.4, so you pay $13.6.

Adding and taking away 20%

Increasing 17 by 20% gives 20.4 and decreasing it by 20% gives 13.6. These do not cancel out: raising 17 by 20% and then lowering the result by 20% ends at 16.32, because the second 20% is taken of a bigger number.

Related results

Results for nearby numbers
5% of 17

5% of 17 = 0.85

10% of 17

10% of 17 = 1.7

15% of 17

15% of 17 = 2.55

25% of 17

25% of 17 = 4.25

50% of 17

50% of 17 = 8.5

75% of 17

75% of 17 = 12.75

The other way round: 17% of 20. 20% of 17 and 17% of 20 are always equal (both are 20 × 17 ÷ 100 = 3.4), so you can swap the numbers when one order is easier to work out in your head.

Practice

4% of 90
Show answer

4% of 90 = 3.6

68% of 69
Show answer

68% of 69 = 46.92

37% of 7
Show answer

37% of 7 = 2.59

74% of 5
Show answer

74% of 5 = 3.7

25% of 48
Show answer

25% of 48 = 12

29% of 25
Show answer

29% of 25 = 7.25

Calculate another

How answers are calculated and checked: methodology.

Questions

What is 20 Percent of 17?

20% of 17 is 3.4. Formula, steps and practice examples.

What is 20% off 17?

13.6. Taking 20% off leaves 80% of 17.

What is 17 plus 20%?

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