How to Calculate Percentages: A Simple Guide
Percentages are used in many everyday situations, including discounts, price changes, grades, statistics, and financial calculations. Understanding a few basic percentage formulas can make these calculations much easier. What Is a Percentage? A percentage is a way of expressing a number as a part of 100. The symbol used for percentage is % . For example, 25% means 25 parts out of 100. How to Calculate a Percentage of a Number To find a percentage of a number, use this formula: Percentage ÷ 100 × Number For example, to calculate 20% of 150: 20 ÷ 100 × 150 = 30 So, 20% of 150 is 30. How to Find What Percentage One Number Is of Another To find what percentage one number represents of another, use: Number ÷ Total × 100 For example, if you have 30 out of 150: 30 ÷ 150 × 100 = 20% Therefore, 30 is 20% of 150. How to Calculate Percentage Increase or Decrease To calculate the percentage change between an original value and a new value, use: (New Value − Original Value) ÷ |Or...