-55.07% is the change from 888 to 399
Calculation steps:
[( 399 - 888 ) ÷ 888] x 100 = -55.07%
Formula
Percentage change = [(399 - 888) / 888] x 100
Subtract the new number by the original number
399 - 888 = -489
-489 ÷ 888 = -0.5506756756756757
-0.5506756756756757 x 100 = -55.07%