Math
Prime Number Checker
Test primality.
What is X% of Y?
Result
30
Percent change
Change
25%
More in Math
Percentage Calculator
Percent of, % change, % increase/decrease.
Discount Calculator
Sale price after a percentage off.
Fraction Calculator
Add, subtract, multiply, divide fractions.
Ratio Calculator
Solve and simplify ratios.
Average (Mean) Calculator
Arithmetic mean of a list.
Standard Deviation
Population and sample SD.