-66.97% is the change from 993 to 328
Calculation steps:
[( 328 - 993 ) ÷ 993] x 100 = -66.97%
Formula
Percentage change = [(328 - 993) / 993] x 100
Subtract the new number by the original number
328 - 993 = -665
-665 ÷ 993 = -0.6696878147029205
-0.6696878147029205 x 100 = -66.97%