12.05% is the change from 307 to 344
Calculation steps:
[( 344 - 307 ) ÷ 307] x 100 = 12.05%
Formula
Percentage change = [(344 - 307) / 307] x 100
Subtract the new number by the original number
344 - 307 = 37
37 ÷ 307 = 0.12052117263843648
0.12052117263843648 x 100 = 12.05%