Amount that was lost in the year 1981 due to fires = $1.1 million Amount that was lost in the year 1988 due to fires = $9.6 million Then Change in the amount of loss between the two years = 9.6 - 1.1 = 8.5 million Percentage change in the amount of loss between the two years = (8.5/1.1) * 100 = 772.73 percent. I hope that the procedure is clear enough for you to understand.