-80.1% is the change from 824 to 164
Calculation steps:
[( 164 - 824 ) ÷ 824] x 100 = -80.1%
Formula
Percentage change = [(164 - 824) / 824] x 100
Subtract the new number by the original number
164 - 824 = -660
-660 ÷ 824 = -0.8009708737864077
-0.8009708737864077 x 100 = -80.1%