-61.9% is the change from 420 to 160
Calculation steps:
[( 160 - 420 ) ÷ 420] x 100 = -61.9%
Formula
Percentage change = [(160 - 420) / 420] x 100
Subtract the new number by the original number
160 - 420 = -260
-260 ÷ 420 = -0.6190476190476191
-0.6190476190476191 x 100 = -61.9%