-51.9% is the change from 420 to 202
Calculation steps:
[( 202 - 420 ) ÷ 420] x 100 = -51.9%
Formula
Percentage change = [(202 - 420) / 420] x 100
Subtract the new number by the original number
202 - 420 = -218
-218 ÷ 420 = -0.5190476190476191
-0.5190476190476191 x 100 = -51.9%