-89.79% is the change from 715 to 73
Calculation steps:
[( 73 - 715 ) ÷ 715] x 100 = -89.79%
Formula
Percentage change = [(73 - 715) / 715] x 100
Subtract the new number by the original number
73 - 715 = -642
-642 ÷ 715 = -0.8979020979020979
-0.8979020979020979 x 100 = -89.79%