-56.62% is the change from 899 to 390
Calculation steps:
[( 390 - 899 ) ÷ 899] x 100 = -56.62%
Formula
Percentage change = [(390 - 899) / 899] x 100
Subtract the new number by the original number
390 - 899 = -509
-509 ÷ 899 = -0.5661846496106785
-0.5661846496106785 x 100 = -56.62%