19.38% is the change from 258 to 308
Calculation steps:
[( 308 - 258 ) ÷ 258] x 100 = 19.38%
Formula
Percentage change = [(308 - 258) / 258] x 100
Subtract the new number by the original number
308 - 258 = 50
50 ÷ 258 = 0.1937984496124031
0.1937984496124031 x 100 = 19.38%