3940% is the change from 15 to 606
Calculation steps:
[( 606 - 15 ) ÷ 15] x 100 = 3940%
Formula
Percentage change = [(606 - 15) / 15] x 100
Subtract the new number by the original number
606 - 15 = 591
591 ÷ 15 = 39.4
39.4 x 100 = 3940%
Example