-99.9% is the change from 994 to 1
Calculation steps:
[( 1 - 994 ) ÷ 994] x 100 = -99.9%
Formula
Percentage change = [(1 - 994) / 994] x 100
Subtract the new number by the original number
1 - 994 = -993
-993 ÷ 994 = -0.9989939637826962
-0.9989939637826962 x 100 = -99.9%