39.15% is the change from 281 to 391
Calculation steps:
[( 391 - 281 ) ÷ 281] x 100 = 39.15%
Formula
Percentage change = [(391 - 281) / 281] x 100
Subtract the new number by the original number
391 - 281 = 110
110 ÷ 281 = 0.3914590747330961
0.3914590747330961 x 100 = 39.15%