15400% is the change from 2 to 310
Calculation steps:
[( 310 - 2 ) ÷ 2] x 100 = 15400%
Formula
Percentage change = [(310 - 2) / 2] x 100
Subtract the new number by the original number
310 - 2 = 308
308 ÷ 2 = 154
154 x 100 = 15400%
Example