To wrap up the calculation, subtract one from this exponent and then multiply by 100 to get the annual percentage change between the two numbers over that period of time.

Percentages aren't always easy to calculate, but one of the best tools in Excel's toolbox is calculating percentages for you. Here's how to do it.

Finding percentage change in Excel requires calculating the difference between two numbers, dividing that difference by the successive number and changing the decimal value to a percentage.

How to Calculate Weight Loss Percentage To calculate weight loss percentage, divide the amount of weight lost by your starting weight, then multiply that by 100.