3120% is the change from 15 to 483
Calculation steps:
[( 483 - 15 ) ÷ 15] x 100 = 3120%
Formula
Percentage change = [(483 - 15) / 15] x 100
Subtract the new number by the original number
483 - 15 = 468
468 ÷ 15 = 31.2
31.2 x 100 = 3120%
Example