Percentage Calculator

Calculate percentages in three common ways. Find what is X% of Y, what percent X is of Y, or percentage increase/decrease.

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Result

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How to use the Percentage Calculator

  1. Pick the type of question you want to answer (X% of Y, X is what % of Y, or % change).
  2. Type the numbers into the matching boxes.
  3. Click Calculate; the answer appears instantly with the working shown.
  4. Use the reset button to clear all fields and try another calculation.

Percentage formulas

X% of Y = (X ÷ 100) × Y
X as % of Y = (X ÷ Y) × 100
% change = (New − Old) ÷ Old × 100

Worked example

Three quick examples

15% of 240 = 0.15 × 240 = 36

45 out of 60 as a percentage = 45 ÷ 60 × 100 = 75%

Price rises from ₹50 to ₹65: (65 − 50) ÷ 50 × 100 = 30% increase

Percentage vs percentage points

If an interest rate moves from 8% to 10%, it has risen by 2 percentage points, but by 25 percent (2 ÷ 8 × 100). News reports often mix these up, so always check which one is meant. Similarly, a 50% fall followed by a 50% rise does not bring you back to the start: ₹100 becomes ₹50 and then only ₹75.

Tips for accurate results

  • For discounts, use "X% of Y" to find the saving, then subtract it from the price.
  • For marks, use "X is what % of Y" with your score and the maximum marks.
  • A negative result in % change means a decrease.

Frequently Asked Questions

Find 10% by moving the decimal one place left, then scale. For example 15% of 240 = 24 (10%) + 12 (5%) = 36.

Divide the final value by (1 + rate). A price of ₹118 after 18% GST was ₹118 ÷ 1.18 = ₹100 before tax.

Yes. If a value triples from 20 to 60, the increase is 200%.

Content reviewed by Vinod, Easy Smart Calculator · Last updated October 2026

Percentage Basics

A percentage represents a fraction of 100. It's a convenient way to express proportions, compare values, and calculate discounts, taxes, and growth rates.

% of a number: (Percentage/100) × Number
% one is of another: (Part/Whole) × 100
% change: ((New−Old)/Old) × 100