250% is the change from 10 to 35
Calculation steps:
[( 35 - 10 ) ÷ 10] x 100 = 250%
Formula
Percentage change = [(35 - 10) / 10] x 100
Subtract the new number by the original number
35 - 10 = 25
25 ÷ 10 = 2.5
2.5 x 100 = 250%
Example