-9.52% is the change from 42 to 38
Calculation steps:
[( 38 - 42 ) ÷ 42] x 100 = -9.52%
Formula
Percentage change = [(38 - 42) / 42] x 100
Subtract the new number by the original number
38 - 42 = -4
-4 ÷ 42 = -0.09523809523809523
-0.09523809523809523 x 100 = -9.52%