Percentage Calculator
Calculate percentages easily — X% of Y, what % is X of Y, and percentage increase or decrease.
Percentage Calculator
Calculate percentage — value, increase/decrease
Enter values
(X ÷ 100) × Y = Result
Enter both values to see the result.
Three main percentage formulas with examples
Percentage questions appear in every BCS, bank, and Primary exam math section. Memorising these three formulas lets you solve any percentage problem easily.
Practical percentage examples in jobs and exams
Discount: 20% off ৳500 = ৳100 discount, price ৳400. These calculations are needed daily in shops, banks, and government work.
Total tools available: 21
How to calculate percentages?
- Choose the calculation type from the tabs.
- Enter the two numbers in the input fields.
- See the live result below.
- Use the copy button to copy the result.
Frequently Asked Questions (FAQ)
How do I calculate a percentage?+
Use the formula X% of Y = (X ÷ 100) × Y.
How to find percentage increase?+
((New − Original) ÷ Original) × 100.
What percent is X of Y?+
(X ÷ Y) × 100. e.g. 30 of 200 = 15%.
How to find percentage of exam marks?+
Divide marks obtained by total and multiply by 100.
How to find percentage decrease?+
((Original − New) ÷ Original) × 100.
What is the formula for percentage increase and decrease?+
Increase = (New − Old) ÷ Old × 100. Decrease = (Old − New) ÷ Old × 100.
How do I calculate discount percentage?+
Discount = Price × Rate ÷ 100. e.g. 20% off ৳500 = ৳100, price ৳400.
Is this calculator free?+
Yes, completely free. Works on mobile and computer with no login.
Last updated: July 2026
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