Percentage Calculator Hub

Everything percentages in one place: basic percent, what percent, increase/decrease, change, discount, markup & margin, exam scores, and % ↔ fraction/decimal.

What is X% of Y?

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A is what percent of B?

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Increase/Decrease by %

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Percentage Change (X → Y)

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Discount Calculator

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Markup & Margin

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Exam Score %

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% → Fraction & Decimal

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About this percentage calculator

This page collects the most common percentage problems in one fast, mobile-friendly place. Use it to find what percent a number is of another, compute discounts, check price increases or decreases, calculate markup and margin for business, estimate exam scores, and convert percentages into fractions and decimals. Everything runs in your browser — no data is sent to a server.

Tips

For discounts, enter the original price and the discount rate — you’ll see the final price and savings.
Markup is based on cost while margin is based on selling price.
Percentage change shows whether the movement from X to Y is an increase (+) or decrease (–).