-64.52% is the change from 420 to 149
Calculation steps:
[( 149 - 420 ) ÷ 420] x 100 = -64.52%
Formula
Percentage change = [(149 - 420) / 420] x 100
Subtract the new number by the original number
149 - 420 = -271
-271 ÷ 420 = -0.6452380952380953
-0.6452380952380953 x 100 = -64.52%