10.53% is the change from 285 to 315
Calculation steps:
[( 315 - 285 ) ÷ 285] x 100 = 10.53%
Formula
Percentage change = [(315 - 285) / 285] x 100
Subtract the new number by the original number
315 - 285 = 30
30 ÷ 285 = 0.10526315789473684
0.10526315789473684 x 100 = 10.53%