-89.96% is the change from 827 to 83
Calculation steps:
[( 83 - 827 ) ÷ 827] x 100 = -89.96%
Formula
Percentage change = [(83 - 827) / 827] x 100
Subtract the new number by the original number
83 - 827 = -744
-744 ÷ 827 = -0.8996372430471584
-0.8996372430471584 x 100 = -89.96%