# Math Percentage Calculation

This online percentage calculator will help you find answers to percentage problems easily. There are separate calculators to find the percentage of a sum, calculate percentage between two numbers, percentage difference between two numbers and also increase or decrease a number by a percentage.

Select a calculator to get started.

## Calculators

### Calculator: 3-way percentage

p% of N = p/100 * N

What is x% of y?

%
of
is 18

What percent is x of y?

of
is 25%

x is y% of what number?

is
%
of 625

### Calculator: Increase a number by a percentage

Formula: Nf = Ni+Ni*P/100 = Ni(1+P/100), where Nf - final value, Ni - starting number, P - percentage to add

Use this calculator to quickly add percentage to a number.

Find Nf

+
%
is 115

Find P%

+
15%
is

Find Ni

100
+
%
is

### Calculator: Decrease a number by a percentage

Formula: Nf = Ni-Ni*P/100 = Ni(1-P/100), where Nf - final value, Ni - starting number, P - percentage to subtract

Use this calculator to subtract percentage from a number.

Find Nf

%
is 85

Find P%

15%
is

Find Ni

100
%
is

For more, see Percentage subtraction

### Calculator: Percentage change

Find the percentage of increase or decrease between two numbers. The formula for calculation is:-
%change = (Final value - Initial value) / Initial value * 100

to
is a increase of 20%

For more, see Percentage change

### Calculator: Percentage difference

Percentage difference is used for comparision of two numbers, where both numbers refer to the same kind of thing. e.g., comparing the cost per kg between two fruits.

between
and
is 200%

For more, see Percentage difference