-55.41% is the change from 942 to 420
Calculation steps:
[( 420 - 942 ) ÷ 942] x 100 = -55.41%
Formula
Percentage change = [(420 - 942) / 942] x 100
Subtract the new number by the original number
420 - 942 = -522
-522 ÷ 942 = -0.554140127388535
-0.554140127388535 x 100 = -55.41%