1450% is the change from 2 to 31
Calculation steps:
[( 31 - 2 ) ÷ 2] x 100 = 1450%
Formula
Percentage change = [(31 - 2) / 2] x 100
Subtract the new number by the original number
31 - 2 = 29
29 ÷ 2 = 14.5
14.5 x 100 = 1450%
Example