Select cell D3 click on the lower right corner of cell D3 and drag it down to cell D13. Select cell D3 and enter the formula shown below. B3-B2 Then you copy this formula to the other cells with the fill-handle.
To change the percentage in cell A1 simply select cell A1 and type a new percentage do not type a decimal number.
As a result a 20 percent increase would be multiplied by 120 percent and a 15 percent increase would be 115 percent or 115. The basic percentage formula is as follows. Percentage Change Formula The percentage between the two values is simply calculated by taking the difference between two numbers and dividing it with the original number. The formula new_value-old_valueold_value can help you quickly calculate the percentage change between two numbers.