Percent increase calculator
Calculator
The calculator needs JavaScript. The tables below give the same numbers for common cases.
How it is worked out
- 15% of 200 = 30.
- Add it: 200 + 30 = 230.
- Shortcut: 200 × 1.15 = 230.
| Inputs | Answer |
|---|---|
| 200, 15 | 200 increased by 15% is 230. |
| 1000, 5 | 1,000 increased by 5% is 1,050. |
| 45, 12 | 45 increased by 12% is 50.4. |
How to use it
To increase a number by a percent, add that percent of the number to it, or multiply by 1 plus the percent as a decimal. 200 increased by 15% is 200 × 1.15 = 230.
Use it for raises, price rises, interest for one period or any growth of a known percent. To find the percent between two known numbers instead, use the percent change calculator.
Frequently asked questions
How do I increase a number by 10%?
Multiply by 1.10.
What is 200 plus 15%?
200 × 1.15 = 230.
Is increasing by 20% then decreasing by 20% a wash?
No. 100 up 20% is 120; 120 down 20% is 96.
Method: standard arithmetic shown step by step; no outside data is used. Checked 2026-11-12.
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General information only. Results are plain arithmetic on the numbers you enter; check anything important (money, health, school work) against your own records or the official source.