UK · Free calculator
Percentage calculator
Calculate percentages, percentage change, and increase or decrease an amount.
Your figures
Rates updated 2026-04-06. Results update as you type.
- Result
- 30
- Value after increase
- 230
- Value after decrease
- 170
How this calculator works
15% of 200 is 30.
15% of 200
Finding 15% of 200.
Assumptions & sources
- Simple arithmetic percentages only.
- Basic percentage arithmetic
Frequently asked questions
Choose “What is X% of Y?” then use the “Value after increase” result, or use percentage change mode.
Estimates only
Handy Money Tools provides illustrative figures, not personalised financial or tax advice. Verify
important decisions with official sources or a qualified adviser.
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