-49.52% is the change from 836 to 422
Calculation steps:
[( 422 - 836 ) ÷ 836] x 100 = -49.52%
Formula
Percentage change = [(422 - 836) / 836] x 100
Subtract the new number by the original number
422 - 836 = -414
-414 ÷ 836 = -0.49521531100478466
-0.49521531100478466 x 100 = -49.52%