38.79% is the change from 281 to 390
Calculation steps:
[( 390 - 281 ) ÷ 281] x 100 = 38.79%
Formula
Percentage change = [(390 - 281) / 281] x 100
Subtract the new number by the original number
390 - 281 = 109
109 ÷ 281 = 0.3879003558718861
0.3879003558718861 x 100 = 38.79%