Multiply the result by 100 to get the percent sales growth. To calculate the percentage increase in sales plus the net sales revenue figures for your two periods you can use the following formula. How to Calculate Percentage Increase Subtract final value minus starting value Divide that amount by the absolute value of the starting value Multiply by 100 to get percent increase If the percentage is negative it means there was a decrease and not an increase.
Then divide that number by the first of the two amounts.
Calculate your expenses for the same period of time for which you collect sales data. How to Calculate Percentage Increase Subtract final value minus starting value Divide that amount by the absolute value of the starting value Multiply by 100 to get percent increase If the percentage is negative it means there was a decrease and not an increase. For example if your business had sales of 2500 this month and sales of 2000 in the same month last year the difference is a 500 increase in sales. Lets start with a new example.