-82.41% is the change from 830 to 146
Calculation steps:
[( 146 - 830 ) ÷ 830] x 100 = -82.41%
Formula
Percentage change = [(146 - 830) / 830] x 100
Subtract the new number by the original number
146 - 830 = -684
-684 ÷ 830 = -0.8240963855421687
-0.8240963855421687 x 100 = -82.41%