There are a few ways to find percentages in Excel. One way is to use the percentage formula, which is =((B2-B1)/B1)*100. Another way is to use the percentage formatting option. To do this, select the cells that you want to format as percentages, and then go to the Home tab and select the Percent Style button. A third way is to use the Percent key on the keyboard. To do this, type the number you want to convert to a percentage, and then press the % key.