-87.62% is the change from 420 to 52
Calculation steps:
[( 52 - 420 ) ÷ 420] x 100 = -87.62%
Formula
Percentage change = [(52 - 420) / 420] x 100
Subtract the new number by the original number
52 - 420 = -368
-368 ÷ 420 = -0.8761904761904762
-0.8761904761904762 x 100 = -87.62%