30.55% is the change from 311 to 406
Calculation steps:
[( 406 - 311 ) ÷ 311] x 100 = 30.55%
Formula
Percentage change = [(406 - 311) / 311] x 100
Subtract the new number by the original number
406 - 311 = 95
95 ÷ 311 = 0.3054662379421222
0.3054662379421222 x 100 = 30.55%