-48.8% is the change from 836 to 428
Calculation steps:
[( 428 - 836 ) ÷ 836] x 100 = -48.8%
Formula
Percentage change = [(428 - 836) / 836] x 100
Subtract the new number by the original number
428 - 836 = -408
-408 ÷ 836 = -0.4880382775119617
-0.4880382775119617 x 100 = -48.8%