Works for any two numbers

Find any percentage in seconds

Work out what a percentage of a number is, or how much one value has changed as a percentage — both instantly, no manual maths.

%

Your numbers

Find X% of a number, or work out the percentage change between two values.

%
0%100%
value
11,00,000

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Result

Percentage0%
Number0
Difference0
Result0

Percentage change is calculated relative to the original value — a rise from 100 to 150 is 50% up, but a fall back from 150 to 100 is a 33.3% drop, not 50%.

How percentages are calculated

A percentage is a fraction out of 100. Finding "X% of a number" means multiplying the number by X and dividing by 100. Percentage change compares a new value to an original one — and because it's always measured against the original, increases and decreases of the same absolute amount rarely produce mirror-image percentages.

1
Pick a mode

Find a percentage of a number, or the percentage change between two values.

2
Enter your numbers

A percentage and a value, or an original and a new value.

3
See the result

The calculated amount or percentage, worked out instantly.

The percentage formulas

X% of number = (X ÷ 100) × number

Percentage change = [(new value − original value) ÷ original value] × 100

A positive result means an increase; a negative result means a decrease.

A worked example

Finding 20% of 500, then checking the change from 500 to 600:

20% of 500100
Original value500
New value600
Difference100
Percentage change+20%

Now reverse it: going from 600 back down to 500 is a −16.7% change, not −20% — because the base value used for the percentage is different each direction.

Common percentage uses

%

Discounts and markups

Δ%

Salary hikes, growth rates

%

Exam scores, grading

Δ%

Investment returns

Frequently asked questions

Why isn't a 20% increase followed by a 20% decrease back to the original?

Because each percentage is calculated on a different base. A 20% increase on 100 gives 120, but a 20% decrease is then calculated on 120, not the original 100 — giving 96, not 100.

How do I find what percentage one number is of another?

Divide the first number by the second, then multiply by 100. For example, 40 out of 200 is (40 ÷ 200) × 100 = 20%.

What's the difference between percentage and percentage points?

A percentage point is a plain difference between two percentages, while a percentage change is relative. Going from 20% to 25% is a rise of 5 percentage points, but a 25% relative increase in the percentage itself.

Can percentage change be more than 100%?

Yes — if a value more than doubles, the percentage increase exceeds 100%. For example, going from 50 to 150 is a 200% increase.

Working out a discount or markup?

This calculator pairs well with our discount calculator for a full pricing breakdown.