What is 20% of 100?
20% of 100 is 20.
- Answer
- 20
- As a fraction
- 1/5 of 100
- 100 + 20%
- 120
- 100 − 20%
- 80
How to calculate it
- 20% = 20 ÷ 100 = 0.2
- 0.2 × 100 = 20
Shortcut: Find 10% (10) and double it: 20. Equivalently, divide by 5.
As a tip: a 20% tip on a $100 bill is $20, making the total $120.
20% of other amounts
Other percentages of 100
Need a different number? Use the percentage calculator for any percent of any amount, percentage change, or “what percent is A of B”.
Frequently asked questions
What is 20% of 100?
20% of 100 is 20, because 20/100 × 100 = 0.2 × 100 = 20.
How do I work out 20 percent of a number?
Divide 20 by 100 to get 0.2, then multiply the number by 0.2. 20% is the same as the fraction 1/5, so you can also multiply by 1 and divide by 5.
What is 100 plus 20%?
100 + 20% = 100 × 1.2 = 120. And 100 minus 20% = 100 × 0.8 = 80.