13.23% is the change from 310 to 351
Calculation steps:
[( 351 - 310 ) ÷ 310] x 100 = 13.23%
Formula
Percentage change = [(351 - 310) / 310] x 100
Subtract the new number by the original number
351 - 310 = 41
41 ÷ 310 = 0.13225806451612904
0.13225806451612904 x 100 = 13.23%