-2.01% is the change from 993 to 973
Calculation steps:
[( 973 - 993 ) ÷ 993] x 100 = -2.01%
Formula
Percentage change = [(973 - 993) / 993] x 100
Subtract the new number by the original number
973 - 993 = -20
-20 ÷ 993 = -0.02014098690835851
-0.02014098690835851 x 100 = -2.01%