-37.34% is the change from 158 to 99
Calculation steps:
[( 99 - 158 ) ÷ 158] x 100 = -37.34%
Formula
Percentage change = [(99 - 158) / 158] x 100
Subtract the new number by the original number
99 - 158 = -59
-59 ÷ 158 = -0.37341772151898733
-0.37341772151898733 x 100 = -37.34%