The answer is 40. Below: three ways to calculate it, a mental shortcut, and the real-world contexts where this percentage shows up.
20% of 200 is 40.
20% has become the standard US tip — and 200 is a round bill for two.
Divide the percent by 100 to convert it: 20 ÷ 100 = 0.2.
Multiply: 200 × 0.2 = 40.
20% means 20/100. So 20% of 200 is (20 × 200) ÷ 100.
Compute: 20 × 200 = 4000, then divide: 4000 ÷ 100 = 40.
For 20%, find 10% first (decimal one place left), then double it. 10% of 200 is 20; double that is 40.
Restaurants in the US typically expect 15–20% tip. The math is the same regardless of percentage — you can apply this same procedure to figure tips, sales tax, discounts, or any other percentage.
If your meal cost $200 and you want to leave a 20% tip, the tip amount is $40. Your total bill becomes $240.
If you only needed to look up this one number, here are some related ones using the same base of 200:
| Calculation | Answer |
|---|---|
| 10% of 200 | 20 |
| 15% of 200 | 30 |
| 18% of 200 | 36 |
| 25% of 200 | 50 |
| Calculation | Answer |
|---|---|
| 20% of 10 | 2 |
| 20% of 15 | 3 |
| 20% of 18 | 3.6 |
| 20% of 20 | 4 |
| 20% of 25 | 5 |
For any percentage of any number, use our percentage of a number calculator.
Multiply 200 by 0.2 (the decimal form of 20%). Or equivalently, multiply by 20/100. The result is 40.
Divide 40 by 200 and multiply by 100. That is exactly 20% — confirming the original calculation.
20% of 200 is 40. That makes the total $240.