How do I calculate a percentage discount?

To calculate a 20% discount on 500 PKR, select "X% of Y" with X=20 and Y=500 to find the discount (100 PKR), then subtract it from 500 to get 400 PKR.

How is percentage increase/decrease calculated?

Percentage Change = [(New Value - Old Value) ÷ Old Value] × 100. A positive result indicates growth, while a negative result represents a decrease.

Income Tax2024-25 ZakatNisab Loan EMI BMI Age Percentage

All Tools/Percentage Calculator

Fast Everyday Math

Percentage Calculator

Four essential percentage, growth rate, and profit margin calculations in one simple tool.

Select Calculation Mode

Percentage (%)

e.g. 15%

Total Amount (Y)

e.g. 5000

Step-by-Step Formula

Calculation: (20 ÷ 100) × 500 = 100

Percentage Result

20% of 500

100

Results calculated instantly with precision rounding. Perfect for sales discounts, markup pricing, and growth metrics.

Quick Answer & Key Takeaway

Mathematical Standard Formulas

How do you calculate percentage, percentage change, and profit margin?

To calculate X% of Y, multiply (X ÷ 100) × Y. For percentage change from X to Y, use [(Y - X) ÷ X] × 100. Profit margin is calculated as [(Selling Price - Cost) ÷ Selling Price] × 100, whereas markup is [(Selling Price - Cost) ÷ Cost] × 100.

Percentage Formula

(X / 100) × Y

Growth Formula

[(New - Old) / Old] × 100

Profit Margin

(Profit / Revenue) × 100

Percentages measure proportions, growth, and profitability. Whether calculating sales discounts, year-on-year business growth, or retail profit margins, this tool provides instant formulas and results.

Percentage Math FAQs

Profit Margin is profit divided by Selling Price (Margin = Profit ÷ Selling Price × 100), while Markup is profit divided by Cost Price (Markup = Profit ÷ Cost Price × 100).