Percentages come up constantly — tips, taxes, sales, and grades. This calculator handles the everyday cases: finding a percent of a number, or increasing and decreasing a number by a percent.
The three operations
“% of” multiplies the number by the percent over 100. “Increase by %” adds that amount on top; “decrease by %” takes it away. To compare two numbers as a percentage change instead, use the dedicated percentage change calculator.