2400% is the change from 10 to 250
Calculation steps:
[( 250 - 10 ) ÷ 10] x 100 = 2400%
Formula
Percentage change = [(250 - 10) / 10] x 100
Subtract the new number by the original number
250 - 10 = 240
240 ÷ 10 = 24
24 x 100 = 2400%
Example