-34.74% is the change from 993 to 648
Calculation steps:
[( 648 - 993 ) ÷ 993] x 100 = -34.74%
Formula
Percentage change = [(648 - 993) / 993] x 100
Subtract the new number by the original number
648 - 993 = -345
-345 ÷ 993 = -0.3474320241691843
-0.3474320241691843 x 100 = -34.74%