9.38% is the change from 288 to 315
Calculation steps:
[( 315 - 288 ) ÷ 288] x 100 = 9.38%
Formula
Percentage change = [(315 - 288) / 288] x 100
Subtract the new number by the original number
315 - 288 = 27
27 ÷ 288 = 0.09375
0.09375 x 100 = 9.38%
Example