-83.6% is the change from 994 to 163
Calculation steps:
[( 163 - 994 ) ÷ 994] x 100 = -83.6%
Formula
Percentage change = [(163 - 994) / 994] x 100
Subtract the new number by the original number
163 - 994 = -831
-831 ÷ 994 = -0.8360160965794768
-0.8360160965794768 x 100 = -83.6%