42.18% is the change from 275 to 391
Calculation steps:
[( 391 - 275 ) ÷ 275] x 100 = 42.18%
Formula
Percentage change = [(391 - 275) / 275] x 100
Subtract the new number by the original number
391 - 275 = 116
116 ÷ 275 = 0.4218181818181818
0.4218181818181818 x 100 = 42.18%