Subtract the smaller number from the larger number
Divide the difference by the original number
Multiply the result by 100
Use the formula: Percentage = (Difference ÷ Original Number) × 100
If finding what percent one number is of another, use: (Part ÷ Whole) × 100
If finding percentage increase, use: ((New Number – Old Number) ÷ Old Number) × 100
If finding percentage decrease, use: ((Old Number – New Number) ÷ Old Number) × 100