980% is the change from 25 to 270
Calculation steps:
[( 270 - 25 ) ÷ 25] x 100 = 980%
Formula
Percentage change = [(270 - 25) / 25] x 100
Subtract the new number by the original number
270 - 25 = 245
245 ÷ 25 = 9.8
9.8 x 100 = 980%
Example