Math Made Easy

Percentage Calculator: Solve Math in Seconds

By Rahul Kumar | Last Updated: December 2025

Percentage Calculator Guide

Percentages (%) are everywhere. From calculating a 20% discount on a t-shirt to figuring out your salary hike or exam marks, we deal with them daily. Yet, finding the exact number can be confusing.

Our Percentage Calculator is an all-in-one tool that handles every type of percentage problem you will ever face. No more scratching your head or using complex formulas!

1. Simple Percentage (X% of Y)

This is the most common use case. You want to find a part of a whole.

Shopping

"Flat 30% OFF on ₹2,000 Shirt."
How much do I save?

Tax (GST)

"18% GST on ₹500 Bill."
How much is the tax?

Formula: (Percentage / 100) × Total Value

Example: 30% of 2000 = (30/100) * 2000 = ₹600.

2. Percentage Increase & Decrease

This is useful for employees checking salary hikes or investors checking profit/loss.

% Increase

Old Salary: ₹50,000
New Salary: ₹60,000
How much % hike did I get?

% Decrease

Old Price: ₹1,000
New Price: ₹800
How much % did the price drop?

Formula: [(New Value - Old Value) / Old Value] × 100

3. "X is what % of Y?"

Students use this to calculate exam percentages.

Scenario: You scored 450 marks out of 500. What is your percentage?

Formula: (Part Value / Total Value) × 100

Calculation: (450 / 500) * 100 = 90%.

4. How to use our Percentage Calculator?

Our tool has 3 different modes for all these problems:

  1. Mode 1 (Basic): Enter "20" % of "500" -> Get 100.
  2. Mode 2 (Change): Enter Old Value & New Value -> Get % Difference.
  3. Mode 3 (Fraction): Enter Part & Total -> Get Percentage.

It saves time and guarantees 100% accuracy without pressing buttons on a physical calculator.


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