What is 20% of 90? = 18
20 percent of 90 is 18. See the step-by-step solution, formula and worked example for how to calculate 20% of 90.
20% of 90 = 18
What is % of
Solution: What is 20 percent of 90?
20% × 90 =
(20 ÷ 100) × 90 =
(20 × 90) ÷ 100 =
1800 ÷ 100 = 18
(20 ÷ 100) × 90 =
(20 × 90) ÷ 100 =
1800 ÷ 100 = 18
Step-by-step explanation
- "Percent" means "per hundred", so 20% = 20 ÷ 100 = 0.2.
- "Of" means multiply, so we calculate 0.2 × 90.
- 0.2 × 90 = 18.
- So 20 percent of 90 is 18.
Good to know
Another way to check this: 1% of 90 is 0.9, and 20% is just 20 of those, so 20 × 0.9 = 18. Because 20% is a common fraction, you can also do it in your head. Percentages like this come up everywhere — working out a 20% deposit, tip, tax or commission on 90, for example.
Quick reference: percentages of 90
| 1% of 90 | 0.9 |
| 5% of 90 | 4.5 |
| 10% of 90 | 9 |
| 15% of 90 | 13.5 |
| 20% of 90 | 18 |
| 25% of 90 | 22.5 |
| 50% of 90 | 45 |
| 75% of 90 | 67.5 |
| 100% of 90 | 90 |
Frequently asked questions
What is 20 percent of 90?
20% of 90 is 18.
How do you calculate 20% of 90?
Divide 20 by 100 to get 0.2, then multiply by 90 to get 18.
What is 90 minus 20%?
90 − 18 = 72 (see 20% off 90).
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