102.39% is the change from 251 to 508
Calculation steps:
[( 508 - 251 ) ÷ 251] x 100 = 102.39%
Formula
Percentage change = [(508 - 251) / 251] x 100
Subtract the new number by the original number
508 - 251 = 257
257 ÷ 251 = 1.0239043824701195
1.0239043824701195 x 100 = 102.39%