Percentage Calculator

Four quick percentage tools in one place: marks percentage, X% of a number, what percent one number is of another, and percentage change.

Marks percentage

Marks obtained

Total marks

Result: -

X% of a number

Percent

Of number

Result: -

What percent is A of B?

Result: -

Percentage increase / decrease

From

Result: -

Percentage formulas

Marks % = Obtained ÷ Total × 100
X% of N = N × X ÷ 100
A as % of B = A ÷ B × 100
% change = (New − Old) ÷ Old × 100

Salary hike: from ₹40,000 to ₹46,000 is a 15% hike. See what it means after tax with the in-hand salary calculator.
Discount: 30% off ₹1,999 saves ₹599.70, so you pay ₹1,399.30.
GST: 18% of ₹2,500 is ₹450. For GST bills use the GST calculator.
Marks: 432 out of 500 is 86.4%. To convert CGPA, use the CGPA to percentage calculator.

If an interest rate goes from 8% to 9%, it rose by 1 percentage point, but by 12.5% in relative terms. News reports often mix these up.

How do I calculate percentage of marks?

Percentage = marks obtained ÷ total marks × 100. For 432 out of 500: 432 ÷ 500 × 100 = 86.4%.

How do I calculate percentage increase?

Percentage change = (new value − old value) ÷ old value × 100. From ₹40,000 to ₹46,000: 6,000 ÷ 40,000 × 100 = 15% increase.

How do I find 18% of a number?

Multiply the number by 18 and divide by 100. 18% of 2,500 = 2,500 × 18 ÷ 100 = 450.

Is a 50% fall followed by a 50% rise back to the start?

No. ₹100 falling 50% becomes ₹50, and a 50% rise on ₹50 gives only ₹75. Percentages are always relative to the starting value.

Last updated: 2026-11-02