2500% is the change from 10 to 260
Calculation steps:
[( 260 - 10 ) ÷ 10] x 100 = 2500%
Formula
Percentage change = [(260 - 10) / 10] x 100
Subtract the new number by the original number
260 - 10 = 250
250 ÷ 10 = 25
25 x 100 = 2500%
Example