-54.29% is the change from 420 to 192
Calculation steps:
[( 192 - 420 ) ÷ 420] x 100 = -54.29%
Formula
Percentage change = [(192 - 420) / 420] x 100
Subtract the new number by the original number
192 - 420 = -228
-228 ÷ 420 = -0.5428571428571428
-0.5428571428571428 x 100 = -54.29%