99.61% is the change from 258 to 515
Calculation steps:
[( 515 - 258 ) ÷ 258] x 100 = 99.61%
Formula
Percentage change = [(515 - 258) / 258] x 100
Subtract the new number by the original number
515 - 258 = 257
257 ÷ 258 = 0.9961240310077519
0.9961240310077519 x 100 = 99.61%