How do you calculate percentage increase between two numbers?

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Free 3-in-1 Percentage Calculator

Calculate percentage of a number, percentage increase/decrease, and ratio percentages instantly.

1What is X% of Y?

What is% of

2X is what % of Y?

is what % of

20.00%

3Percentage Increase / Decrease

Fromto

+25.00%

Overview & Architecture

What is the Free Online Percentage Calculator?

Percentage math is used daily for shopping discounts, tip calculation, financial analysis, and academic grades. Our 3-in-1 Percentage Calculator handles all common percent math operations instantly with step-by-step formulas.

Step-by-Step Instructions

How to Use the Free Online Percentage Calculator

Select Calculation Mode: What is X% of Y, X is what % of Y, or % Change from X to Y.

Enter your numbers into the input boxes.

View calculated percentage result and plain-English formula breakdown.

Key Features & Security Guarantees

3-in-1 Percentage Suite: Covers simple percent, percentage change, and ratio percentages.

Real-Time Calculation: Results update instantly as you type numbers.

Formula Explanations: Shows exact mathematical formula used.

Got Questions?

Frequently Asked Questions

Subtract the old value from the new value, divide by the old value, and multiply by 100.

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