1425% is the change from 20 to 305
Calculation steps:
[( 305 - 20 ) ÷ 20] x 100 = 1425%
Formula
Percentage change = [(305 - 20) / 20] x 100
Subtract the new number by the original number
305 - 20 = 285
285 ÷ 20 = 14.25
14.25 x 100 = 1425%
Example