Calculate percentages quickly – % of a number, increase/decrease, and more
Percentage = (Part / Whole) × 100
For example: What is 20% of 500? Answer: (20/100) × 500 = 100
A percentage is a way of expressing a number as a fraction of 100. The word "percent" comes from the Latin per centum, meaning "by the hundred." Percentages are used everywhere — in discounts, exam scores, GST, interest rates, salary hikes, and data analysis.
Our calculator handles three common types of percentage problems: finding a percentage of a number, finding what percentage one number is of another, and calculating percentage change (increase or decrease).
Old salary: ₹40,000 | New salary: ₹46,000
Percentage Increase = [(46,000 − 40,000) ÷ 40,000] × 100
= [6,000 ÷ 40,000] × 100 = 15% salary hike ✅
Percentage of marks = (Marks Obtained ÷ Total Marks) × 100. Example: Scored 450 out of 600 → (450 ÷ 600) × 100 = 75%.
Discount Amount = (Discount% ÷ 100) × Original Price. Example: 30% off on ₹2,000 MRP → (30 ÷ 100) × 2,000 = ₹600 discount → Final price = ₹1,400.
If the new value is higher than the old value, it is a percentage increase. If lower, it is a percentage decrease. Formula is the same: [(New − Old) ÷ Old] × 100. A negative result = decrease.
GST (Goods and Services Tax) is applied as a percentage on the base price. For example, if GST rate is 18%, the tax on a ₹1,000 product = 18% of ₹1,000 = ₹180, so you pay ₹1,180. Use our GST Calculator for accurate GST splits.