-47.39% is the change from 306 to 161
Calculation steps:
[( 161 - 306 ) ÷ 306] x 100 = -47.39%
Formula
Percentage change = [(161 - 306) / 306] x 100
Subtract the new number by the original number
161 - 306 = -145
-145 ÷ 306 = -0.4738562091503268
-0.4738562091503268 x 100 = -47.39%