-74.22% is the change from 993 to 256
Calculation steps:
[( 256 - 993 ) ÷ 993] x 100 = -74.22%
Formula
Percentage change = [(256 - 993) / 993] x 100
Subtract the new number by the original number
256 - 993 = -737
-737 ÷ 993 = -0.7421953675730111
-0.7421953675730111 x 100 = -74.22%