-60.16% is the change from 999 to 398
Calculation steps:
[( 398 - 999 ) ÷ 999] x 100 = -60.16%
Formula
Percentage change = [(398 - 999) / 999] x 100
Subtract the new number by the original number
398 - 999 = -601
-601 ÷ 999 = -0.6016016016016016
-0.6016016016016016 x 100 = -60.16%