3920% is the change from 15 to 603
Calculation steps:
[( 603 - 15 ) ÷ 15] x 100 = 3920%
Formula
Percentage change = [(603 - 15) / 15] x 100
Subtract the new number by the original number
603 - 15 = 588
588 ÷ 15 = 39.2
39.2 x 100 = 3920%
Example