15150% is the change from 2 to 305
Calculation steps:
[( 305 - 2 ) ÷ 2] x 100 = 15150%
Formula
Percentage change = [(305 - 2) / 2] x 100
Subtract the new number by the original number
305 - 2 = 303
303 ÷ 2 = 151.5
151.5 x 100 = 15150%
Example