-88.37% is the change from 688 to 80
Calculation steps:
[( 80 - 688 ) ÷ 688] x 100 = -88.37%
Formula
Percentage change = [(80 - 688) / 688] x 100
Subtract the new number by the original number
80 - 688 = -608
-608 ÷ 688 = -0.8837209302325582
-0.8837209302325582 x 100 = -88.37%