-59.92% is the change from 998 to 400
Calculation steps:
[( 400 - 998 ) ÷ 998] x 100 = -59.92%
Formula
Percentage change = [(400 - 998) / 998] x 100
Subtract the new number by the original number
400 - 998 = -598
-598 ÷ 998 = -0.5991983967935872
-0.5991983967935872 x 100 = -59.92%