-55.51% is the change from 899 to 400
Calculation steps:
[( 400 - 899 ) ÷ 899] x 100 = -55.51%
Formula
Percentage change = [(400 - 899) / 899] x 100
Subtract the new number by the original number
400 - 899 = -499
-499 ÷ 899 = -0.5550611790878754
-0.5550611790878754 x 100 = -55.51%