-55.17% is the change from 890 to 399
Calculation steps:
[( 399 - 890 ) ÷ 890] x 100 = -55.17%
Formula
Percentage change = [(399 - 890) / 890] x 100
Subtract the new number by the original number
399 - 890 = -491
-491 ÷ 890 = -0.5516853932584269
-0.5516853932584269 x 100 = -55.17%