-3.32% is the change from 993 to 960
Calculation steps:
[( 960 - 993 ) ÷ 993] x 100 = -3.32%
Formula
Percentage change = [(960 - 993) / 993] x 100
Subtract the new number by the original number
960 - 993 = -33
-33 ÷ 993 = -0.03323262839879154
-0.03323262839879154 x 100 = -3.32%