-99.42% is the change from 688 to 4
Calculation steps:
[( 4 - 688 ) ÷ 688] x 100 = -99.42%
Formula
Percentage change = [(4 - 688) / 688] x 100
Subtract the new number by the original number
4 - 688 = -684
-684 ÷ 688 = -0.9941860465116279
-0.9941860465116279 x 100 = -99.42%