-80.42% is the change from 812 to 159
Calculation steps:
[( 159 - 812 ) ÷ 812] x 100 = -80.42%
Formula
Percentage change = [(159 - 812) / 812] x 100
Subtract the new number by the original number
159 - 812 = -653
-653 ÷ 812 = -0.8041871921182266
-0.8041871921182266 x 100 = -80.42%