-89.16% is the change from 913 to 99
Calculation steps:
[( 99 - 913 ) ÷ 913] x 100 = -89.16%
Formula
Percentage change = [(99 - 913) / 913] x 100
Subtract the new number by the original number
99 - 913 = -814
-814 ÷ 913 = -0.891566265060241
-0.891566265060241 x 100 = -89.16%