-89.81% is the change from 913 to 93
Calculation steps:
[( 93 - 913 ) ÷ 913] x 100 = -89.81%
Formula
Percentage change = [(93 - 913) / 913] x 100
Subtract the new number by the original number
93 - 913 = -820
-820 ÷ 913 = -0.8981380065717415
-0.8981380065717415 x 100 = -89.81%