-83.5% is the change from 994 to 164
Calculation steps:
[( 164 - 994 ) ÷ 994] x 100 = -83.5%
Formula
Percentage change = [(164 - 994) / 994] x 100
Subtract the new number by the original number
164 - 994 = -830
-830 ÷ 994 = -0.8350100603621731
-0.8350100603621731 x 100 = -83.5%