-54.52% is the change from 420 to 191
Calculation steps:
[( 191 - 420 ) ÷ 420] x 100 = -54.52%
Formula
Percentage change = [(191 - 420) / 420] x 100
Subtract the new number by the original number
191 - 420 = -229
-229 ÷ 420 = -0.5452380952380952
-0.5452380952380952 x 100 = -54.52%