-16.7% is the change from 994 to 828
Calculation steps:
[( 828 - 994 ) ÷ 994] x 100 = -16.7%
Formula
Percentage change = [(828 - 994) / 994] x 100
Subtract the new number by the original number
828 - 994 = -166
-166 ÷ 994 = -0.16700201207243462
-0.16700201207243462 x 100 = -16.7%