-99.9% is the change from 983 to 1
Calculation steps:
[( 1 - 983 ) ÷ 983] x 100 = -99.9%
Formula
Percentage change = [(1 - 983) / 983] x 100
Subtract the new number by the original number
1 - 983 = -982
-982 ÷ 983 = -0.9989827060020345
-0.9989827060020345 x 100 = -99.9%