-1.19% is the change from 420 to 415
Calculation steps:
[( 415 - 420 ) ÷ 420] x 100 = -1.19%
Formula
Percentage change = [(415 - 420) / 420] x 100
Subtract the new number by the original number
415 - 420 = -5
-5 ÷ 420 = -0.011904761904761904
-0.011904761904761904 x 100 = -1.19%