21.9% is the change from 315 to 384
Calculation steps:
[( 384 - 315 ) ÷ 315] x 100 = 21.9%
Formula
Percentage change = [(384 - 315) / 315] x 100
Subtract the new number by the original number
384 - 315 = 69
69 ÷ 315 = 0.21904761904761905
0.21904761904761905 x 100 = 21.9%