How do you calculate percentage?

To calculate a percentage, divide the part by the whole and multiply by 100. Formula: (Part / Whole) × 100 = Percentage.

How do I calculate percentage difference?

To find the percentage difference between two numbers, subtract the old value from the new value, divide by the absolute value of the old value, and multiply by 100. Formula: ((New - Old) / |Old|) × 100.

Utility

Percentage Calculator

Instantly solve three common types of percentage problems.

1. What is X% of Y?

2. X is what percent of Y?

3. Percentage Change

How to Calculate Percentages

Percentages appear everywhere — discounts, tax rates, interest, tips, statistics, grades, and more. Mastering the three core percentage calculations handles nearly every scenario you'll encounter.

The Three Core Percentage Calculations

What is X% of Y? — Multiply: X ÷ 100 × Y. What is 15% of $80? = 0.15 × 80 = $12
X is what % of Y? — Divide: (X ÷ Y) × 100. 12 is what % of 80? = (12 ÷ 80) × 100 = 15%
Percentage change — ((New - Old) ÷ Old) × 100. Price went from $80 to $92: ((92-80) ÷ 80) × 100 = 15% increase

Frequently Asked Questions

How do I calculate a percentage increase?

Subtract the original from the new value, divide by the original, then multiply by 100. Formula: ((New Value - Old Value) ÷ Old Value) × 100. Example: salary went from $50,000 to $55,000 = ((55,000 - 50,000) ÷ 50,000) × 100 = 10% increase.

What is the difference between percentage and percentage points?

If an interest rate rises from 4% to 6%, that's an increase of 2 percentage points — but a 50% increase in the rate itself. This distinction is frequently confused in news and financial reporting. "Percentage point" is an absolute change; "percent" or "percentage change" is relative.

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