8.89% is the change from 315 to 343
Calculation steps:
[( 343 - 315 ) ÷ 315] x 100 = 8.89%
Formula
Percentage change = [(343 - 315) / 315] x 100
Subtract the new number by the original number
343 - 315 = 28
28 ÷ 315 = 0.08888888888888889
0.08888888888888889 x 100 = 8.89%