-56.21% is the change from 306 to 134
Calculation steps:
[( 134 - 306 ) ÷ 306] x 100 = -56.21%
Formula
Percentage change = [(134 - 306) / 306] x 100
Subtract the new number by the original number
134 - 306 = -172
-172 ÷ 306 = -0.5620915032679739
-0.5620915032679739 x 100 = -56.21%