-82.8% is the change from 994 to 171
Calculation steps:
[( 171 - 994 ) ÷ 994] x 100 = -82.8%
Formula
Percentage change = [(171 - 994) / 994] x 100
Subtract the new number by the original number
171 - 994 = -823
-823 ÷ 994 = -0.8279678068410463
-0.8279678068410463 x 100 = -82.8%