How to use this Percentage calculator
Percentages are everywhere — discounts, interest, tax, exam scores and tips — yet doing the arithmetic in your head invites mistakes. A quick, reliable tool removes the doubt.
This calculator finds a percentage of any number instantly, so you can settle everyday maths questions without reaching for a spreadsheet.
The basic calculation
To find X% of a value, the calculator computes value × X ÷ 100. So 18% of 2,500 is 2,500 × 18 ÷ 100 = 450.
This single operation underlies discounts, GST, interest and most other percentage problems.
Everyday uses
Use it to work out a tip, a sale saving, a commission, an exam mark or the share one number is of another.
Because the logic is the same each time, getting comfortable with it speeds up countless small decisions.
Percentage change
To find how much a value has risen or fallen, divide the difference by the original number and multiply by 100.
A jump from 200 to 250 is a 25% increase, while a drop from 250 to 200 is a 20% decrease — the base you divide by matters.