-19.05% is the change from 42 to 34
Calculation steps:
[( 34 - 42 ) ÷ 42] x 100 = -19.05%
Formula
Percentage change = [(34 - 42) / 42] x 100
Subtract the new number by the original number
34 - 42 = -8
-8 ÷ 42 = -0.19047619047619047
-0.19047619047619047 x 100 = -19.05%