2564% is the change from 25 to 666
Calculation steps:
[( 666 - 25 ) ÷ 25] x 100 = 2564%
Formula
Percentage change = [(666 - 25) / 25] x 100
Subtract the new number by the original number
666 - 25 = 641
641 ÷ 25 = 25.64
25.64 x 100 = 2564%
Example