-11.9% is the change from 420 to 370
Calculation steps:
[( 370 - 420 ) ÷ 420] x 100 = -11.9%
Formula
Percentage change = [(370 - 420) / 420] x 100
Subtract the new number by the original number
370 - 420 = -50
-50 ÷ 420 = -0.11904761904761904
-0.11904761904761904 x 100 = -11.9%