-84.25% is the change from 800 to 126
Calculation steps:
[( 126 - 800 ) ÷ 800] x 100 = -84.25%
Formula
Percentage change = [(126 - 800) / 800] x 100
Subtract the new number by the original number
126 - 800 = -674
-674 ÷ 800 = -0.8425
-0.8425 x 100 = -84.25%