-89% is the change from 827 to 91
Calculation steps:
[( 91 - 827 ) ÷ 827] x 100 = -89%
Formula
Percentage change = [(91 - 827) / 827] x 100
Subtract the new number by the original number
91 - 827 = -736
-736 ÷ 827 = -0.8899637243047158
-0.8899637243047158 x 100 = -89%