-73.42% is the change from 158 to 42
Calculation steps:
[( 42 - 158 ) ÷ 158] x 100 = -73.42%
Formula
Percentage change = [(42 - 158) / 158] x 100
Subtract the new number by the original number
42 - 158 = -116
-116 ÷ 158 = -0.7341772151898734
-0.7341772151898734 x 100 = -73.42%