-74.29% is the change from 420 to 108
Calculation steps:
[( 108 - 420 ) ÷ 420] x 100 = -74.29%
Formula
Percentage change = [(108 - 420) / 420] x 100
Subtract the new number by the original number
108 - 420 = -312
-312 ÷ 420 = -0.7428571428571429
-0.7428571428571429 x 100 = -74.29%