100.78% is the change from 258 to 518
Calculation steps:
[( 518 - 258 ) ÷ 258] x 100 = 100.78%
Formula
Percentage change = [(518 - 258) / 258] x 100
Subtract the new number by the original number
518 - 258 = 260
260 ÷ 258 = 1.0077519379844961
1.0077519379844961 x 100 = 100.78%