Percentage Calculator
Calculate percentages easily: find X% of Y, what percent X is of Y, or percent change between values.
Examples
What is 25% of 200?
Find a quarter of 200
- Mode
- Percent of
- Percent
- 25 %
- Of amount
- 200
Amount
50
Embed this calculator
Copy a free iframe snippet for articles, learning pages, forums, wikis, newsletters, and internal docs.
How It Works
Formula
Variables, symbols and units
- First value (the percentage in mode 1, original value in mode 3)
- Second value (the base in modes 1 & 2, new value in mode 3)
Calculation method explained
Select one of three modes: (1) find X% of Y by multiplying Y by X/100, (2) find what percent X is of Y by dividing X by Y and multiplying by 100, (3) find percent change from X to Y using (Y−X)/|X| × 100.
Examples
What is 25% of 200?Percent of · 25 % → 50
Find a quarter of 200
- Mode
- Percent of
- Percent
- 25 %
- Of amount
- 200
- Amount
- 50
50 is what % of 200?Part as % · 50 → 25%
Find the percentage ratio
- Mode
- Part as %
- Part
- 50
- Whole
- 200
- Percent of total
- 25%
% change from 80 to 100% change · 80 → 25%
Calculate the percent increase
- Mode
- % change
- Original value
- 80
- New value
- 100
- Percent change
- 25%
Frequently Asked Questions
How do I find X% of a number?
Multiply the number by X/100. For example, 25% of 200 = 200 × 0.25 = 50.
How do I find what percent X is of Y?
Divide X by Y and multiply by 100. For example, 50 is (50/200) × 100 = 25% of 200.
How is percent change calculated?
Percent change = ((New − Old) / |Old|) × 100. A positive result means increase, negative means decrease.
What does percent mean?
Percent means "per hundred." 25% means 25 out of 100, or the fraction 25/100 = 0.25.
Can percent change be more than 100%?
Yes. If a value doubles, the percent change is 100%. If it triples, the change is 200%.