Math calculator
What percent is this?
Quickly solve percentage questions: percent of a value, percent change between two numbers, or what percent one number is of another. Use the tabs to switch calculation types.
Try the calculator
Perfect for discounts, growth rates, and quick comparisons.
Formula cheat sheet
Percent of: (percent / 100) x value. Percent change: (new - old) / old x 100. Percent one number is of another: (part / whole) x 100.
Example scenario
If a $48 item drops to $36, the percent change is (36 - 48) / 48 x 100 = -25%. That means the price fell by 25%.
What this means
- - Discounts and sales tax
- - Growth rates and KPIs
- - Test scores and grading curves
- - Budgeting and allocation planning
What to do next
Use the result to make quick decisions like discount checks, savings goals, or budget splits.
FAQ
How do I calculate percent of a number?
Multiply the number by the percentage expressed as a decimal. For example, 25% of 200 is 0.25 x 200 = 50.
What is percent change?
Percent change compares the difference between two values to the original value: (new - old) / old x 100%.
Why are my percent change results negative?
A negative percent change simply means the new value is smaller than the original value.