For example calculate the percentage change between the price of crude oil in April ie. 30 per thousand barrels. Multiply by 100 to get percent decrease.
To work out the increase as a percentage it is now necessary to divide the increase by the original January number.
On the Home tab click the Percentage button. Calculating percentage increase is as simple as dividing the size of the increase by the original amount. If you are using Excel for the web click Home Number Format Percentage. Select cell C3 click on the lower right corner of cell C3 and drag it down to cell C13.