-72.62% is the change from 420 to 115
Calculation steps:
[( 115 - 420 ) ÷ 420] x 100 = -72.62%
Formula
Percentage change = [(115 - 420) / 420] x 100
Subtract the new number by the original number
115 - 420 = -305
-305 ÷ 420 = -0.7261904761904762
-0.7261904761904762 x 100 = -72.62%