-46.84% is the change from 79 to 42
Calculation steps:
[( 42 - 79 ) ÷ 79] x 100 = -46.84%
Formula
Percentage change = [(42 - 79) / 79] x 100
Subtract the new number by the original number
42 - 79 = -37
-37 ÷ 79 = -0.46835443037974683
-0.46835443037974683 x 100 = -46.84%