2544% is the change from 25 to 661
Calculation steps:
[( 661 - 25 ) ÷ 25] x 100 = 2544%
Formula
Percentage change = [(661 - 25) / 25] x 100
Subtract the new number by the original number
661 - 25 = 636
636 ÷ 25 = 25.44
25.44 x 100 = 2544%
Example