30.65% is the change from 310 to 405
Calculation steps:
[( 405 - 310 ) ÷ 310] x 100 = 30.65%
Formula
Percentage change = [(405 - 310) / 310] x 100
Subtract the new number by the original number
405 - 310 = 95
95 ÷ 310 = 0.3064516129032258
0.3064516129032258 x 100 = 30.65%