3640% is the change from 15 to 561
Calculation steps:
[( 561 - 15 ) ÷ 15] x 100 = 3640%
Formula
Percentage change = [(561 - 15) / 15] x 100
Subtract the new number by the original number
561 - 15 = 546
546 ÷ 15 = 36.4
36.4 x 100 = 3640%
Example