9% is the change from 289 to 315
Calculation steps:
[( 315 - 289 ) ÷ 289] x 100 = 9%
Formula
Percentage change = [(315 - 289) / 289] x 100
Subtract the new number by the original number
315 - 289 = 26
26 ÷ 289 = 0.08996539792387544
0.08996539792387544 x 100 = 9%