-15.91% is the change from 993 to 835
Calculation steps:
[( 835 - 993 ) ÷ 993] x 100 = -15.91%
Formula
Percentage change = [(835 - 993) / 993] x 100
Subtract the new number by the original number
835 - 993 = -158
-158 ÷ 993 = -0.15911379657603222
-0.15911379657603222 x 100 = -15.91%