-89.36% is the change from 686 to 73
Calculation steps:
[( 73 - 686 ) ÷ 686] x 100 = -89.36%
Formula
Percentage change = [(73 - 686) / 686] x 100
Subtract the new number by the original number
73 - 686 = -613
-613 ÷ 686 = -0.8935860058309038
-0.8935860058309038 x 100 = -89.36%