-10.79% is the change from 343 to 306
Calculation steps:
[( 306 - 343 ) ÷ 343] x 100 = -10.79%
Formula
Percentage change = [(306 - 343) / 343] x 100
Subtract the new number by the original number
306 - 343 = -37
-37 ÷ 343 = -0.10787172011661808
-0.10787172011661808 x 100 = -10.79%