-30.95% is the change from 42 to 29
Calculation steps:
[( 29 - 42 ) ÷ 42] x 100 = -30.95%
Formula
Percentage change = [(29 - 42) / 42] x 100
Subtract the new number by the original number
29 - 42 = -13
-13 ÷ 42 = -0.30952380952380953
-0.30952380952380953 x 100 = -30.95%