-48.2% is the change from 305 to 158
Calculation steps:
[( 158 - 305 ) ÷ 305] x 100 = -48.2%
Formula
Percentage change = [(158 - 305) / 305] x 100
Subtract the new number by the original number
158 - 305 = -147
-147 ÷ 305 = -0.4819672131147541
-0.4819672131147541 x 100 = -48.2%