3080% is the change from 15 to 477
Calculation steps:
[( 477 - 15 ) ÷ 15] x 100 = 3080%
Formula
Percentage change = [(477 - 15) / 15] x 100
Subtract the new number by the original number
477 - 15 = 462
462 ÷ 15 = 30.8
30.8 x 100 = 3080%
Example