-87.21% is the change from 688 to 88
Calculation steps:
[( 88 - 688 ) ÷ 688] x 100 = -87.21%
Formula
Percentage change = [(88 - 688) / 688] x 100
Subtract the new number by the original number
88 - 688 = -600
-600 ÷ 688 = -0.872093023255814
-0.872093023255814 x 100 = -87.21%