Everyday Essentials

Percentage Calculator

Calculate percentages instantly — find X% of Y, what percent X is of Y, or percentage change between two numbers.

✓ Runs in your browser · Updated 2026-03-30

Enter values and click Calculate Percentage to see results

Calculate percentages instantly — find X% of Y, what percent X is of Y, or percentage change between two numbers.

Updated: 2026-03-30

Percentage Formulas

X% of Y = Y × X / 100

X is what % of Y = (X / Y) × 100

% Change = ((New − Old) / Old) × 100

% Increase = Value × (1 + %/100)

% Decrease = Value × (1 − %/100)

How to Use the Percentage Calculator

Select the type of percentage calculation you need from the dropdown. Enter the two values and click Calculate to get an instant result. You can also share the result using the link button — the URL saves all your inputs.

What is a Percentage?

A percentage is a way of expressing a number as a fraction of 100. The word comes from the Latin "per centum", meaning "by the hundred". Percentages are used everywhere — from shopping discounts to exam scores to interest rates. Understanding percentages helps you make better financial decisions, compare deals, and interpret data.

Three Types of Percentage Calculations

  • What is X% of Y? — Multiply Y by X/100. Example: 20% of 500 = 100.
  • X is what % of Y? — Divide X by Y and multiply by 100. Example: 100 is 20% of 500.
  • Percentage change — ((New − Old) / Old) × 100. Example: Change from 400 to 500 = +25%.

Formulas

X% of Y = (X / 100) × Y X is what % of Y = (X / Y) × 100 % Change = ((New − Old) / Old) × 100

Common Uses in India

Percentage calculations are essential for everyday tasks in India — calculating GST amounts, understanding salary hikes, comparing fixed deposit returns, working out discounts during festive sales, and checking exam score cut-offs. This tool handles all three common scenarios with instant results.

Frequently Asked Questions

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

Divide the part by the whole and multiply by 100. For example, 25 out of 200 is (25 ÷ 200) × 100 = 12.5%.

What is the difference between percentage change and percentage difference?

Percentage change measures increase or decrease from an original value, while percentage difference compares two values relative to their average.

How do I calculate percentage increase or decrease?

Subtract the old value from the new value, divide by the old value, and multiply by 100. A positive result is an increase, negative is a decrease.