104% is the change from 25 to 51
Calculation steps:
[( 51 - 25 ) ÷ 25] x 100 = 104%
Formula
Percentage change = [(51 - 25) / 25] x 100
Subtract the new number by the original number
51 - 25 = 26
26 ÷ 25 = 1.04
1.04 x 100 = 104%
Example