-88.81% is the change from 688 to 77
Calculation steps:
[( 77 - 688 ) ÷ 688] x 100 = -88.81%
Formula
Percentage change = [(77 - 688) / 688] x 100
Subtract the new number by the original number
77 - 688 = -611
-611 ÷ 688 = -0.8880813953488372
-0.8880813953488372 x 100 = -88.81%