250% is the change from 14 to 49
Calculation steps:
[( 49 - 14 ) ÷ 14] x 100 = 250%
Formula
Percentage change = [(49 - 14) / 14] x 100
Subtract the new number by the original number
49 - 14 = 35
35 ÷ 14 = 2.5
2.5 x 100 = 250%
Example