2580% is the change from 25 to 670
Calculation steps:
[( 670 - 25 ) ÷ 25] x 100 = 2580%
Formula
Percentage change = [(670 - 25) / 25] x 100
Subtract the new number by the original number
670 - 25 = 645
645 ÷ 25 = 25.8
25.8 x 100 = 2580%
Example