Percentage Calculator

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Calculate percentages, change, increase, and decrease.
What is% of
50.00
Formula: (25/100) × 200 = 50.00

Why use this?

Percentages are everywhere.

Frequently Asked Questions

How do I calculate a percentage of a number?
To find X% of a number, multiply the number by X and divide by 100. For example, 20% of 150 is: 150 × 20 ÷ 100 = 30. Our calculator does this automatically.
How do I calculate percentage increase?
Percentage increase = ((New Value - Original Value) ÷ Original Value) × 100. For example, if price went from $50 to $60: ((60-50) ÷ 50) × 100 = 20% increase.
How do I calculate percentage decrease?
Percentage decrease = ((Original Value - New Value) ÷ Original Value) × 100. For example, if price dropped from $100 to $75: ((100-75) ÷ 100) × 100 = 25% decrease.
What is X as a percentage of Y?
To find what percentage X is of Y, divide X by Y and multiply by 100. For example, 25 is what % of 200? (25 ÷ 200) × 100 = 12.5%.
How do I calculate the original price after a discount?
Original price = Discounted price ÷ (1 - Discount%/100). For example, if $80 is after 20% discount: $80 ÷ (1 - 0.20) = $80 ÷ 0.80 = $100 original price.