-17.82% is the change from 993 to 816
Calculation steps:
[( 816 - 993 ) ÷ 993] x 100 = -17.82%
Formula
Percentage change = [(816 - 993) / 993] x 100
Subtract the new number by the original number
816 - 993 = -177
-177 ÷ 993 = -0.1782477341389728
-0.1782477341389728 x 100 = -17.82%