Percentage Calculator
Quickly compute X% of Y, percent increase/decrease, and reverse percentage problems. Handy for discounts, markups, and homework.
Formula
Percent of a value: X% of Y = (X ÷ 100) × Y. Increase: New = Old × (1 + X/100). Decrease: New = Old × (1 − X/100).
- X — Percentage rate
- Y — Base value
Example Calculation
What is 18% of 2,500?
Result: 2,500 × 0.18 = 450
Practical Uses
- Sale discounts
- Profit/markup
- Exam scores
Percentage
Find X% of Y, what percent, or percent change.
Result
30
FAQs
Percent to decimal?
Divide by 100 (18% = 0.18).
Stacked discounts?
Apply sequentially (not additive).
Disclaimer
For education only.