-82.2% is the change from 820 to 146
Calculation steps:
[( 146 - 820 ) ÷ 820] x 100 = -82.2%
Formula
Percentage change = [(146 - 820) / 820] x 100
Subtract the new number by the original number
146 - 820 = -674
-674 ÷ 820 = -0.8219512195121951
-0.8219512195121951 x 100 = -82.2%