-48.28% is the change from 812 to 420
Calculation steps:
[( 420 - 812 ) ÷ 812] x 100 = -48.28%
Formula
Percentage change = [(420 - 812) / 812] x 100
Subtract the new number by the original number
420 - 812 = -392
-392 ÷ 812 = -0.4827586206896552
-0.4827586206896552 x 100 = -48.28%