-11.05% is the change from 344 to 306
Calculation steps:
[( 306 - 344 ) ÷ 344] x 100 = -11.05%
Formula
Percentage change = [(306 - 344) / 344] x 100
Subtract the new number by the original number
306 - 344 = -38
-38 ÷ 344 = -0.11046511627906977
-0.11046511627906977 x 100 = -11.05%