-30.82% is the change from 993 to 687
Calculation steps:
[( 687 - 993 ) ÷ 993] x 100 = -30.82%
Formula
Percentage change = [(687 - 993) / 993] x 100
Subtract the new number by the original number
687 - 993 = -306
-306 ÷ 993 = -0.3081570996978852
-0.3081570996978852 x 100 = -30.82%