-46.2% is the change from 158 to 85
Calculation steps:
[( 85 - 158 ) ÷ 158] x 100 = -46.2%
Formula
Percentage change = [(85 - 158) / 158] x 100
Subtract the new number by the original number
85 - 158 = -73
-73 ÷ 158 = -0.4620253164556962
-0.4620253164556962 x 100 = -46.2%