2.86% is the change from 315 to 324
Calculation steps:
[( 324 - 315 ) ÷ 315] x 100 = 2.86%
Formula
Percentage change = [(324 - 315) / 315] x 100
Subtract the new number by the original number
324 - 315 = 9
9 ÷ 315 = 0.02857142857142857
0.02857142857142857 x 100 = 2.86%
Example