12.77% is the change from 274 to 309
Calculation steps:
[( 309 - 274 ) ÷ 274] x 100 = 12.77%
Formula
Percentage change = [(309 - 274) / 274] x 100
Subtract the new number by the original number
309 - 274 = 35
35 ÷ 274 = 0.12773722627737227
0.12773722627737227 x 100 = 12.77%