20.54% is the change from 258 to 311
Calculation steps:
[( 311 - 258 ) ÷ 258] x 100 = 20.54%
Formula
Percentage change = [(311 - 258) / 258] x 100
Subtract the new number by the original number
311 - 258 = 53
53 ÷ 258 = 0.2054263565891473
0.2054263565891473 x 100 = 20.54%