Percentage Calculator
About the Percentage Calculator
What is X% of Y?
Calculate what percentage of a number equals. For example, find what 15% of 200 equals.
Formula: (X / 100) × Y
X is what percentage of Y?
Calculate what percentage one number is of another. For example, find what percentage 30 is of 200.
Formula: (X / Y) × 100
Percentage change from X to Y
Calculate the percentage increase or decrease from one value to another. For example, find the percentage change from 100 to 150.
Formula: ((Y - X) / |X|) × 100
Apply X% change to Y
Calculate the result after applying a percentage increase or decrease to a value. For example, find the result after applying a 20% increase to 100.
Formula: Y × (1 + X/100)
Common Percentage Calculations
Percentages are used in everyday calculations from shopping discounts to interest rates. Our calculator handles all common percentage calculations with accuracy up to 2 decimal places.
Tips for Using the Percentage Calculator
- Select the appropriate calculation type before entering values
- For percentage decrease, use a negative percentage in the "Apply X% change to Y" option
- Results are automatically rounded to 2 decimal places for clarity
- For sales tax or discount calculations, use the "Apply X% change to Y" option