Loona Calculators
Three everyday percentage calculations in one place: find a percentage of a number, see what percent one number is of another, and measure the percentage increase or decrease between two values.
Choose the first mode, enter X (the percent) and Y (the number). Example: 20% of 500 = 100.
(New − Old) ÷ Old × 100. A positive answer is an increase, negative is a decrease.
Yes — and for marks specifically, try our Marks Percentage Calculator.