17.82% is the change from 331 to 390
Calculation steps:
[( 390 - 331 ) ÷ 331] x 100 = 17.82%
Formula
Percentage change = [(390 - 331) / 331] x 100
Subtract the new number by the original number
390 - 331 = 59
59 ÷ 331 = 0.1782477341389728
0.1782477341389728 x 100 = 17.82%