-12.57% is the change from 350 to 306
Calculation steps:
[( 306 - 350 ) ÷ 350] x 100 = -12.57%
Formula
Percentage change = [(306 - 350) / 350] x 100
Subtract the new number by the original number
306 - 350 = -44
-44 ÷ 350 = -0.12571428571428572
-0.12571428571428572 x 100 = -12.57%