A tip for great service
A 15% tip on a bill of 60 is 9, making the total 69.
EVERYDAY MATH, MADE SIMPLE
Percentage calculator
Find percentages in seconds. No head-scratching required.
YOUR RESULT
15% of 200 is
30
15 ÷ 100 × 200 = 30
Calculated instantly. Rounded to 6 decimal places.
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01
How to calculate a percentage
A percentage is a way to express a number as a fraction of 100. You can use it to work out a tip, check a test score, or find part of a total.
The formula
Percentage ÷ 100 × Number = Result-
1
Start with your percentage
For example, to find 15% of 200, start with 15.
-
2
Divide it by 100
15 ÷ 100 = 0.15. This turns the percentage into a decimal.
-
3
Multiply by the number
0.15 × 200 = 30. So, 15% of 200 is 30.
02
Percentages in everyday life
Your latest test score
Getting 42 out of 50 questions right gives you a score of 84%.
Progress toward a goal
Completing 18 of 24 tasks means you are 75% of the way there.
03
Common percentages at a glance
Use this quick reference to find a percentage of 50, 100, or 200.
| Percentage | Of 50 | Of 100 | Of 200 |
|---|---|---|---|
| 5% | 2.5 | 5 | 10 |
| 10% | 5 | 10 | 20 |
| 15% | 7.5 | 15 | 30 |
| 20% | 10 | 20 | 40 |
| 25% | 12.5 | 25 | 50 |
| 50% | 25 | 50 | 100 |
| 75% | 37.5 | 75 | 150 |
04
A few common questions
How do I find what percentage one number is of another?
Divide the first number by the total, then multiply by 100. For example, 30 ÷ 200 × 100 = 15%, so 30 is 15% of 200. Choose “X is what % of Y?” above to do this calculation. The total cannot be zero.
How do I calculate a percentage without a calculator?
Find 10% by dividing the number by 10. Find 1% by dividing by 100. Combine these to build other percentages: 15% of 200 is 10% (20) plus 5% (10), giving 30.
Can a percentage be more than 100%?
Yes. A percentage above 100% is larger than the original whole. For example, 150% of 200 is 300. Negative percentages also work for the basic percentage calculations.
What is the difference between percent and percentage points?
If a rate rises from 10% to 15%, it increases by 5 percentage points. Its relative percentage increase is 50%, because (15 − 10) ÷ 10 × 100 = 50. Use the percentage change calculator for a relative change.
How precise are the results?
Results are displayed to at most six decimal places. Very small nonzero results use scientific notation. Calculations use standard browser floating-point arithmetic, so small rounding differences are possible. Check important figures independently.