What is 90% of 20? = 18
90 percent of 20 is 18. See the step-by-step solution, formula and worked example for how to calculate 90% of 20.
90% of 20 = 18
What is % of
Solution: What is 90 percent of 20?
90% × 20 =
(90 ÷ 100) × 20 =
(90 × 20) ÷ 100 =
1800 ÷ 100 = 18
(90 ÷ 100) × 20 =
(90 × 20) ÷ 100 =
1800 ÷ 100 = 18
Step-by-step explanation
- "Percent" means "per hundred", so 90% = 90 ÷ 100 = 0.9.
- "Of" means multiply, so we calculate 0.9 × 20.
- 0.9 × 20 = 18.
- So 90 percent of 20 is 18.
Good to know
Another way to check this: 1% of 20 is 0.2, and 90% is just 90 of those, so 90 × 0.2 = 18. Percentages like this come up everywhere — working out a 90% deposit, tip, tax or commission on 20, for example.
Quick reference: percentages of 20
| 1% of 20 | 0.2 |
| 5% of 20 | 1 |
| 10% of 20 | 2 |
| 15% of 20 | 3 |
| 20% of 20 | 4 |
| 25% of 20 | 5 |
| 50% of 20 | 10 |
| 75% of 20 | 15 |
| 100% of 20 | 20 |
Frequently asked questions
What is 90 percent of 20?
90% of 20 is 18.
How do you calculate 90% of 20?
Divide 90 by 100 to get 0.9, then multiply by 20 to get 18.
What is 20 minus 90%?
20 − 18 = 2 (see 90% off 20).
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