-89.63% is the change from 955 to 99
Calculation steps:
[( 99 - 955 ) ÷ 955] x 100 = -89.63%
Formula
Percentage change = [(99 - 955) / 955] x 100
Subtract the new number by the original number
99 - 955 = -856
-856 ÷ 955 = -0.8963350785340314
-0.8963350785340314 x 100 = -89.63%