Percentage Calculator
Calculate percentages, percentage increase, decrease, and differences instantly
What is X% of Y?
X is what percent of Y?
Percentage Increase / Decrease
What Is a Percentage Calculator?
A percentage calculator finds what one number represents as a fraction of 100, so you can calculate percentage of a number, percentage increase, percentage decrease, or the percent difference between two values in one place.
Calculator Features
- What is X% of Y?
- X is what percent of Y?
- Percentage increase
- Percentage decrease
- Percentage difference
- Clean mobile interface
- Instant calculation
Percentage Formulas
- Percentage of a number: (X ÷ 100) × Y = result — multiply the number by the percentage, then divide by 100
- What percent one number is of another: (X ÷ Y) × 100 = percent — divide the part by the whole, then multiply by 100
- Percentage change: ((New − Original) ÷ Original) × 100 = percent change — use the calculator above and enter your original and new values
Common Percentage Examples
- 20% of 50 is 10
- 15 is 30% of 50
- A price moving from $80 to $100 is a 25% increase
- A price moving from $100 to $80 is a 20% decrease
- A 20% tip on a $60 bill is $12
Frequently Asked Questions
How do I calculate a percentage increase?
Subtract the original value from the new value, divide by the original, then multiply by 100.
Can a percentage be more than 100%?
Yes. That just means the part is larger than the whole you're comparing it to. For example, if sales grow from $50,000 to $120,000, that's a $70,000 increase, which is 140% of the original $50,000 — so sales increased by 140%.
Can this tool handle negative percentages?
Yes. Negative results indicate a decrease, reduction, or loss relative to the starting value.
How do I find the original price before a discount?
Divide the sale price by (1 - discount percentage as a decimal).
What is the difference between percentage points and percent change?
Percentage points measure absolute difference (5% to 7% = 2 points), while percent change measures relative growth (5% to 7% = 40% increase).
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