Percentage Calculator
X% of Y, percentage increase and percentage decrease in one place.
Percentage
Pick a mode, then fill in the two values.
Mode
%
Result
Result
30.00
- Calculation
- 15.00% of 200.00
- Result
- 30.00
- Remaining part
- 170.00
- As a fraction
- 15.00% of 200.00
Percentage change uses (new − old) ÷ old × 100, the standard definition.
Frequently asked questions
- How is percentage change calculated?
- (new − old) ÷ old × 100, so a move from 80 to 100 is a 25% increase.
- Can I use decimals?
- Yes, every field accepts decimal values.
Something wrong with this tool or its numbers?
Report an issueRecommended next
What people usually reach for after this tool.
Related articles
Finance
VAT explained simply for small businesses
What VAT actually is, when you have to register, and how to keep the arithmetic painless.
6 min read
Business
How to price freelance work without guessing
A repeatable pricing method built on utilisation, target income and value-based adjustments.
7 min read
Health
What BMI tells you, and what it definitely does not
BMI is a fast population-level screen. Here is how to read it without over-interpreting it.
5 min readPopular tools
The calculators people reach for most.
New tools, every week
One short email when we ship something genuinely useful. No spam, unsubscribe anytime.