-22.22% is the change from 54 to 42
Calculation steps:
[( 42 - 54 ) ÷ 54] x 100 = -22.22%
Formula
Percentage change = [(42 - 54) / 54] x 100
Subtract the new number by the original number
42 - 54 = -12
-12 ÷ 54 = -0.2222222222222222
-0.2222222222222222 x 100 = -22.22%