-29.51% is the change from 566 to 399
Calculation steps:
[( 399 - 566 ) ÷ 566] x 100 = -29.51%
Formula
Percentage change = [(399 - 566) / 566] x 100
Subtract the new number by the original number
399 - 566 = -167
-167 ÷ 566 = -0.2950530035335689
-0.2950530035335689 x 100 = -29.51%