-17.22% is the change from 987 to 817
Calculation steps:
[( 817 - 987 ) ÷ 987] x 100 = -17.22%
Formula
Percentage change = [(817 - 987) / 987] x 100
Subtract the new number by the original number
817 - 987 = -170
-170 ÷ 987 = -0.17223910840932116
-0.17223910840932116 x 100 = -17.22%