-99.56% is the change from 688 to 3
Calculation steps:
[( 3 - 688 ) ÷ 688] x 100 = -99.56%
Formula
Percentage change = [(3 - 688) / 688] x 100
Subtract the new number by the original number
3 - 688 = -685
-685 ÷ 688 = -0.9956395348837209
-0.9956395348837209 x 100 = -99.56%