-85.17% is the change from 688 to 102
Calculation steps:
[( 102 - 688 ) ÷ 688] x 100 = -85.17%
Formula
Percentage change = [(102 - 688) / 688] x 100
Subtract the new number by the original number
102 - 688 = -586
-586 ÷ 688 = -0.8517441860465116
-0.8517441860465116 x 100 = -85.17%