Utilz
Percentage Calculator
Calculate percentages in three different ways
What is X% of Y?
X is what % of Y?
% change from X to Y
Want to learn more? Read our guide: Mastering Percentage Calculations
Why Use This Tool?
- Solve three types of percentage problems with a single tool.
- Avoid manual calculation errors for discounts, tips, grades, and statistics.
- Get instant results for percentage change, which is tricky to calculate by hand.
Formula
X% of Y = Y x X / 100. "X is what % of Y" = (X / Y) x 100. Percentage Change = ((New - Old) / Old) x 100. For example, 20% of 150 = 30; 30 is 20% of 150; change from 100 to 125 = +25%.
How to Use
- Choose a calculation mode: "X% of Y", "X is what % of Y", or "% change"
- Enter the required values
- See the result instantly
FAQ
How do I calculate percentage change?
Percentage change = ((New Value - Old Value) / Old Value) × 100. A positive result means an increase, negative means a decrease.
What is the formula for "X% of Y"?
To find X% of Y, multiply Y by X and divide by 100. For example, 20% of 150 = 150 × 20 / 100 = 30.
How do I find what percentage one number is of another?
Divide the part by the whole and multiply by 100. For example, 30 is what percent of 150? Answer: (30 / 150) × 100 = 20%.
Can percentage change be negative?
Yes. A negative percentage change means a decrease. For example, going from 200 to 150 is a -25% change.
How do I calculate a percentage increase or decrease?
Percentage increase = ((New - Old) / Old) x 100. For decrease, the result will be negative. For example, from 80 to 100 is a 25% increase; from 100 to 80 is a 20% decrease.