-89.23% is the change from 817 to 88
Calculation steps:
[( 88 - 817 ) ÷ 817] x 100 = -89.23%
Formula
Percentage change = [(88 - 817) / 817] x 100
Subtract the new number by the original number
88 - 817 = -729
-729 ÷ 817 = -0.8922888616891065
-0.8922888616891065 x 100 = -89.23%