All Calculators
Percentage Calculator
Three modes: find X% of Y, calculate percentage change, or convert marks to percentage.
%
What is Percentage
What is Percentage
A percentage is a number expressed as a fraction of 100. It is commonly used to compare values, calculate discounts, and measure changes.
Basic Percentage Formula
Basic Percentage Formula
Percentage = (Part ÷ Total) × 100
Example:
If you scored 80 out of 100:
Percentage = (80 ÷ 100) × 100 = 80%
If you scored 80 out of 100:
Percentage = (80 ÷ 100) × 100 = 80%
Percentage Increase Formula
Percentage Increase Formula
Increase % = [(New Value − Old Value) ÷ Old Value] × 100
Old Price₹100
New Price₹120
Increase20%
Percentage Decrease Formula
Percentage Decrease Formula
Decrease % = [(Old Value − New Value) ÷ Old Value] × 100
Old Price₹100
New Price₹80
Decrease20%
Marks to Percentage
Marks to Percentage
Percentage = (Marks Obtained ÷ Total Marks) × 100
Why Percentage Calculator is Useful
Quick and accurate calculations
Get instant percentage results without errors
Useful for students, business, and daily use
Works for marks, discounts, profit/loss and more
Helps in discounts, profit/loss, and comparisons
Compare values easily with percentage change
Frequently Asked Questions
A percentage is a value out of 100.
Divide the part by total and multiply by 100.
Use the formula: (New − Old) ÷ Old × 100.
Divide obtained marks by total marks and multiply by 100.