3040% is the change from 15 to 471
Calculation steps:
[( 471 - 15 ) ÷ 15] x 100 = 3040%
Formula
Percentage change = [(471 - 15) / 15] x 100
Subtract the new number by the original number
471 - 15 = 456
456 ÷ 15 = 30.4
30.4 x 100 = 3040%
Example