Percentage Calculator
Calculate percentages instantly โ increase, decrease, and more.
What is X% of Y?
๐ก Press Enter to calculate
Frequently Asked Questions
How do I calculate percentage increase?
Use the formula: ((New - Original) / Original) ร 100. For example, if a price goes from $50 to $75, the increase is ((75-50)/50) ร 100 = 50%.
How do I calculate percentage decrease?
Use the formula: ((Original - New) / Original) ร 100. For example, if a price drops from $100 to $80, the decrease is ((100-80)/100) ร 100 = 20%.
What is X percent of Y?
Multiply Y by (X/100). For example, 25% of 200 = 200 ร 0.25 = 50.
Report a Problem
Found a bug or have a suggestion? Help us improve this tool.
What is this tool?
Percentage calculator computes percentage-based calculations including X% of Y, what percent X is of Y, and percentage change between two values. It handles common percentage problems like discounts, taxes, tips, interest, and statistical changes. The formula for percentage is: (Part/Whole) ร 100.
How to use
- 1
Select calculation type
Choose: X% of Y, X is what % of Y, or % change from X to Y.
- 2
Enter values
Input the numbers for your calculation.
- 3
View result
See the computed percentage with the formula shown.
Frequently Asked Questions
How do I calculate percentage change?
Percentage Change = ((New - Old) / |Old|) ร 100. A positive result means increase, negative means decrease. For example, if price goes from $80 to $100, the change is ((100-80)/80) ร 100 = 25% increase.
What is 15% of 200?
15% of 200 = (15/100) ร 200 = 30. The general formula is: X% of Y = (X/100) ร Y = X ร Y/100.
How do I calculate what percent one number is of another?
Divide the part by the whole and multiply by 100. Formula: (Part / Whole) ร 100. For example, 25 is what percent of 80? Answer: (25 / 80) ร 100 = 31.25%. This is useful for grades, budget allocation, survey results, and any scenario where you need to express a part-to-whole relationship.