-39.14% is the change from 999 to 608
Calculation steps:
[( 608 - 999 ) ÷ 999] x 100 = -39.14%
Formula
Percentage change = [(608 - 999) / 999] x 100
Subtract the new number by the original number
608 - 999 = -391
-391 ÷ 999 = -0.3913913913913914
-0.3913913913913914 x 100 = -39.14%