-90.03% is the change from 913 to 91
Calculation steps:
[( 91 - 913 ) ÷ 913] x 100 = -90.03%
Formula
Percentage change = [(91 - 913) / 913] x 100
Subtract the new number by the original number
91 - 913 = -822
-822 ÷ 913 = -0.9003285870755751
-0.9003285870755751 x 100 = -90.03%