4360% is the change from 15 to 669
Calculation steps:
[( 669 - 15 ) ÷ 15] x 100 = 4360%
Formula
Percentage change = [(669 - 15) / 15] x 100
Subtract the new number by the original number
669 - 15 = 654
654 ÷ 15 = 43.6
43.6 x 100 = 4360%
Example