2390% is the change from 10 to 249
Calculation steps:
[( 249 - 10 ) ÷ 10] x 100 = 2390%
Formula
Percentage change = [(249 - 10) / 10] x 100
Subtract the new number by the original number
249 - 10 = 239
239 ÷ 10 = 23.9
23.9 x 100 = 2390%
Example