-77.18% is the change from 688 to 157
Calculation steps:
[( 157 - 688 ) ÷ 688] x 100 = -77.18%
Formula
Percentage change = [(157 - 688) / 688] x 100
Subtract the new number by the original number
157 - 688 = -531
-531 ÷ 688 = -0.7718023255813954
-0.7718023255813954 x 100 = -77.18%