-21.7% is the change from 917 to 718
Calculation steps:
[( 718 - 917 ) ÷ 917] x 100 = -21.7%
Formula
Percentage change = [(718 - 917) / 917] x 100
Subtract the new number by the original number
718 - 917 = -199
-199 ÷ 917 = -0.21701199563794984
-0.21701199563794984 x 100 = -21.7%