-99.6% is the change from 994 to 4
Calculation steps:
[( 4 - 994 ) ÷ 994] x 100 = -99.6%
Formula
Percentage change = [(4 - 994) / 994] x 100
Subtract the new number by the original number
4 - 994 = -990
-990 ÷ 994 = -0.9959758551307847
-0.9959758551307847 x 100 = -99.6%