-11.56% is the change from 346 to 306
Calculation steps:
[( 306 - 346 ) ÷ 346] x 100 = -11.56%
Formula
Percentage change = [(306 - 346) / 346] x 100
Subtract the new number by the original number
306 - 346 = -40
-40 ÷ 346 = -0.11560693641618497
-0.11560693641618497 x 100 = -11.56%