-82.51% is the change from 812 to 142
Calculation steps:
[( 142 - 812 ) ÷ 812] x 100 = -82.51%
Formula
Percentage change = [(142 - 812) / 812] x 100
Subtract the new number by the original number
142 - 812 = -670
-670 ÷ 812 = -0.8251231527093597
-0.8251231527093597 x 100 = -82.51%