17.8% is the change from 264 to 311
Calculation steps:
[( 311 - 264 ) ÷ 264] x 100 = 17.8%
Formula
Percentage change = [(311 - 264) / 264] x 100
Subtract the new number by the original number
311 - 264 = 47
47 ÷ 264 = 0.17803030303030304
0.17803030303030304 x 100 = 17.8%