-81.65% is the change from 823 to 151
Calculation steps:
[( 151 - 823 ) ÷ 823] x 100 = -81.65%
Formula
Percentage change = [(151 - 823) / 823] x 100
Subtract the new number by the original number
151 - 823 = -672
-672 ÷ 823 = -0.8165249088699879
-0.8165249088699879 x 100 = -81.65%