-52.27% is the change from 331 to 158
Calculation steps:
[( 158 - 331 ) ÷ 331] x 100 = -52.27%
Formula
Percentage change = [(158 - 331) / 331] x 100
Subtract the new number by the original number
158 - 331 = -173
-173 ÷ 331 = -0.5226586102719033
-0.5226586102719033 x 100 = -52.27%