Percentage Calculator

Solve any percentage problem: Increases, Decreases, or Fractions.

Result
0
Formula: (Percentage ÷ 100) × Number
Percentage Increase
0%
Formula: ((New - Original) ÷ Original) × 100
Percentage Decrease
0%
Formula: ((Original - New) ÷ Original) × 100
Result
0%
Formula: (Part ÷ Total) × 100

Percentage Calculator – Easy Way to Solve Math Problems

Percentages are everywhere. Whether you are calculating exam marks, working out a shopping discount, figuring out your salary hike, or splitting a restaurant bill tip, percentages play a crucial role in daily life. A Percentage Calculator helps you solve these calculations instantly without needing a calculator app or complex mental math.

Quick Overview: This all-in-one tool handles 4 common tasks: 1. Finding the percentage of a number (e.g., 20% of 500). 2. Calculating percentage growth (e.g., Salary Hike). 3. Calculating percentage drop (e.g., Discount). 4. Finding what percent one number is of another (e.g., Exam Score).

What Is a Percentage?

A percentage represents a number as a fraction of 100. The word “percent” comes from the Latin per centum, meaning "by the hundred." It is denoted by the symbol "%". It provides a standardized way to compare quantities regardless of their scale.

Formulas Used in This Tool

Understanding the math behind the tool can help you in daily life:

  • Basic Percentage: (Percentage ÷ 100) × Number.
    Example: 20% of 500 = (20/100) × 500 = 100.
  • Percentage Increase: ((New Value - Old Value) ÷ Old Value) × 100.
    Example: Salary went from 500 to 600. Increase = (100/500) × 100 = 20%.
  • Percentage Decrease: ((Old Value - New Value) ÷ Old Value) × 100.
    Example: Price dropped from 100 to 80. Decrease = (20/100) × 100 = 20%.
  • X is what % of Y: (Part ÷ Total) × 100.
    Example: You scored 45 out of 50. (45/50) × 100 = 90%.

Real-Life Examples of Percentage Use

  1. Shopping Discounts: You see a shirt priced at ₹1000 with a "30% OFF" sticker. Use the "Basic %" tab to find that 30% of 1000 is ₹300. So, you pay ₹700.
  2. Stock Market: You bought a stock at ₹200 and sold it at ₹250. Use "Percentage Increase" to see you made a 25% profit.
  3. Tax Calculations: If GST is 18% on a ₹500 item, the tax amount is ₹90. Total cost = ₹590.
  4. Exam Results: If a student gets 450 marks out of a total of 600, use the "What % is X of Y" tab to find out they scored 75%.
Common Mistake: When calculating Increase or Decrease, always divide by the Original (Old) number, not the new one. This is where most people go wrong manually!

Why Use an Online Calculator?

While the math isn't impossible, it is easy to make decimal errors manually. An online Percentage Calculator saves time, ensures accuracy to two decimal places, and handles large numbers effortlessly. It is especially useful for students checking homework, freelancers calculating taxes, and shoppers checking deals.