103.59% is the change from 251 to 511
Calculation steps:
[( 511 - 251 ) ÷ 251] x 100 = 103.59%
Formula
Percentage change = [(511 - 251) / 251] x 100
Subtract the new number by the original number
511 - 251 = 260
260 ÷ 251 = 1.0358565737051793
1.0358565737051793 x 100 = 103.59%