-79.8% is the change from 812 to 164
Calculation steps:
[( 164 - 812 ) ÷ 812] x 100 = -79.8%
Formula
Percentage change = [(164 - 812) / 812] x 100
Subtract the new number by the original number
164 - 812 = -648
-648 ÷ 812 = -0.7980295566502463
-0.7980295566502463 x 100 = -79.8%