I don't understand how to find the percentages.

The income statements for Anything Tennis for the years ending December 31, 2018 and 2017, are provided below Required 1. Complete the "Amount" and"%" columns to be used in a horizontal analysis of the income statements for Anything Tennis. (Decreases should be indicated by a minus sign. Round your percentage answers to 1 decimal place.) ANYTHING TENNIS Income Statements For the Years Ended December 31 Increase (Decrease) Amount 2018 2017 $ 3,260,000 $ 2,460,000 800,000 730,000 70,000 172,000 (102,000) 3,200 (98,800) (36,000) $ 332,400 395,200 (62,800) Net sales 2,070,000 1,190,000 770,000 420,000 8,400 428,400 96,000 1,340,000 1,120,000 598,000 522,000 5,200 527,200 132,000 Cost of goods sold Gross profit Operating expenses Operating income Other income (expense) Income before tax Income tax expense Net income