-88.71% is the change from 815 to 92
Calculation steps:
[( 92 - 815 ) ÷ 815] x 100 = -88.71%
Formula
Percentage change = [(92 - 815) / 815] x 100
Subtract the new number by the original number
92 - 815 = -723
-723 ÷ 815 = -0.8871165644171779
-0.8871165644171779 x 100 = -88.71%