-87.65% is the change from 688 to 85
Calculation steps:
[( 85 - 688 ) ÷ 688] x 100 = -87.65%
Formula
Percentage change = [(85 - 688) / 688] x 100
Subtract the new number by the original number
85 - 688 = -603
-603 ÷ 688 = -0.876453488372093
-0.876453488372093 x 100 = -87.65%