New value old valueold value. This gives you the year-over-year growth rate. Multiply this new number by 100.
Convert the value to percentages.
If you are using Excel for the web click Home Number Format Percentage. To increase value or to calculate the amount of percentage increase in excel below mentioned formulas are used. Calculating percentage increase is as simple as dividing the size of the increase by the original amount. Then divide that result by the old value.