97.29% is the change from 258 to 509
Calculation steps:
[( 509 - 258 ) ÷ 258] x 100 = 97.29%
Formula
Percentage change = [(509 - 258) / 258] x 100
Subtract the new number by the original number
509 - 258 = 251
251 ÷ 258 = 0.9728682170542635
0.9728682170542635 x 100 = 97.29%