8.62% is the change from 290 to 315
Calculation steps:
[( 315 - 290 ) ÷ 290] x 100 = 8.62%
Formula
Percentage change = [(315 - 290) / 290] x 100
Subtract the new number by the original number
315 - 290 = 25
25 ÷ 290 = 0.08620689655172414
0.08620689655172414 x 100 = 8.62%