-56.06% is the change from 908 to 399
Calculation steps:
[( 399 - 908 ) ÷ 908] x 100 = -56.06%
Formula
Percentage change = [(399 - 908) / 908] x 100
Subtract the new number by the original number
399 - 908 = -509
-509 ÷ 908 = -0.5605726872246696
-0.5605726872246696 x 100 = -56.06%