-89.39% is the change from 688 to 73
Calculation steps:
[( 73 - 688 ) ÷ 688] x 100 = -89.39%
Formula
Percentage change = [(73 - 688) / 688] x 100
Subtract the new number by the original number
73 - 688 = -615
-615 ÷ 688 = -0.8938953488372093
-0.8938953488372093 x 100 = -89.39%