-68.78% is the change from 993 to 310
Calculation steps:
[( 310 - 993 ) ÷ 993] x 100 = -68.78%
Formula
Percentage change = [(310 - 993) / 993] x 100
Subtract the new number by the original number
310 - 993 = -683
-683 ÷ 993 = -0.6878147029204431
-0.6878147029204431 x 100 = -68.78%