-80.8% is the change from 823 to 158
Calculation steps:
[( 158 - 823 ) ÷ 823] x 100 = -80.8%
Formula
Percentage change = [(158 - 823) / 823] x 100
Subtract the new number by the original number
158 - 823 = -665
-665 ÷ 823 = -0.8080194410692588
-0.8080194410692588 x 100 = -80.8%