Percentage Calculator

Use this Percentage Calculator to quickly compute percent values, find what percent one number is of another, or calculate percentage increase or decrease. Fast, accurate, and ideal for finance, discounts, or data analysis.

Find What Percent One Number Is of Another

What Percent of Base
0%

Find a Percentage of a Base

Result (Percent of Base)
0

About the Percentage Calculator

The Percentage Calculator makes solving percent-based problems simple and fast. Whether you're finding discounts, calculating markups, or comparing values, it handles all common percentage cases in one place.

Formulas Used

Part = (Percentage ÷ 100) × Base
Percentage = (Part ÷ Base) × 100
Change% = ((New − Old) ÷ Old) × 100

Example Calculations

  • 25% of 200 = (25 ÷ 100) × 200 = 50
  • 50 is what percent of 200? = (50 ÷ 200) × 100 = 25%
  • From 200 to 250 = ((250 − 200) ÷ 200) × 100 = 25% increase

Accepted Inputs

  • Integers and decimals (e.g., 12.5)
  • Positive and negative numbers supported

Frequently Asked Questions

  • How do you calculate a percentage?
    Multiply by the percent and divide by 100.
  • How to find what percent one number is of another?
    Divide part by base, then multiply by 100.
  • Can I use decimals?
    Yes, the calculator handles decimals and negatives.
  • How do I find percentage change?
    ((New − Old) ÷ Old) × 100
  • Difference between increase and decrease?
    Increase is growth from original; decrease is reduction.
  • Where are percentages used?
    In finance, sales, grades, and data analysis.