Percentage Calculator

What is X% of Y, percentage change and more. Mode A: Result = Y * (X / 100); Mode B: Result = (X / Y) * 100; Mode C: Result = ((To - From) / From) * 100 HOW IT WORKS Percent changes compound on different bases: 100 → 50 is −50%, but recovering from 50 to 100 requires +100%. Always note which base a percentage refers to. Validation: Mode B: Total (Y) cannot be 0; Mode C: From cannot be 0