-1.6% is the change from 999 to 983
Calculation steps:
[( 983 - 999 ) ÷ 999] x 100 = -1.6%
Formula
Percentage change = [(983 - 999) / 999] x 100
Subtract the new number by the original number
983 - 999 = -16
-16 ÷ 999 = -0.016016016016016016
-0.016016016016016016 x 100 = -1.6%