-48.04% is the change from 306 to 159
Calculation steps:
[( 159 - 306 ) ÷ 306] x 100 = -48.04%
Formula
Percentage change = [(159 - 306) / 306] x 100
Subtract the new number by the original number
159 - 306 = -147
-147 ÷ 306 = -0.4803921568627451
-0.4803921568627451 x 100 = -48.04%