30.87% is the change from 298 to 390
Calculation steps:
[( 390 - 298 ) ÷ 298] x 100 = 30.87%
Formula
Percentage change = [(390 - 298) / 298] x 100
Subtract the new number by the original number
390 - 298 = 92
92 ÷ 298 = 0.3087248322147651
0.3087248322147651 x 100 = 30.87%