24.76% is the change from 311 to 388
Calculation steps:
[( 388 - 311 ) ÷ 311] x 100 = 24.76%
Formula
Percentage change = [(388 - 311) / 311] x 100
Subtract the new number by the original number
388 - 311 = 77
77 ÷ 311 = 0.24758842443729903
0.24758842443729903 x 100 = 24.76%