-91.86% is the change from 688 to 56
Calculation steps:
[( 56 - 688 ) ÷ 688] x 100 = -91.86%
Formula
Percentage change = [(56 - 688) / 688] x 100
Subtract the new number by the original number
56 - 688 = -632
-632 ÷ 688 = -0.9186046511627907
-0.9186046511627907 x 100 = -91.86%