1020% is the change from 25 to 280
Calculation steps:
[( 280 - 25 ) ÷ 25] x 100 = 1020%
Formula
Percentage change = [(280 - 25) / 25] x 100
Subtract the new number by the original number
280 - 25 = 255
255 ÷ 25 = 10.2
10.2 x 100 = 1020%
Example