-53.1% is the change from 420 to 197
Calculation steps:
[( 197 - 420 ) ÷ 420] x 100 = -53.1%
Formula
Percentage change = [(197 - 420) / 420] x 100
Subtract the new number by the original number
197 - 420 = -223
-223 ÷ 420 = -0.530952380952381
-0.530952380952381 x 100 = -53.1%