Percentage Calculator
Four calculation modes: find X% of Y, calculate what % X is of Y, compute percentage change between two values, and convert marks to percentage.
What is X% of Y?
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Features
- 4 calculation modes in one tool
- Find what X% of a number is
- Calculate what percentage one number is of another
- Percentage increase and decrease calculator
- Marks to percentage converter for students
- Instant results with no button press needed
Frequently Asked Questions
How do I calculate a percentage of a number?
To find X% of Y, multiply Y by X and divide by 100. For example, 20% of 150 = (150 × 20) / 100 = 30. Use Mode 1 of our calculator to get instant results.
How do I calculate percentage increase or decrease?
Percentage change = ((New Value − Old Value) / Old Value) × 100. A positive result means an increase and a negative result means a decrease. For example, from 80 to 100: ((100−80)/80)×100 = 25% increase.
How do I convert marks to percentage?
Percentage = (Marks Obtained / Total Marks) × 100. For example, if you scored 450 out of 600: (450/600) × 100 = 75%. Use the Marks tab in our calculator for this conversion.
What is X% of Y?
To find what X percent of Y is, use the formula: Result = (X / 100) × Y. For instance, 15% of 200 = (15/100) × 200 = 30. Enter X and Y in Mode 1 of the percentage calculator for an instant answer.