-0.6% is the change from 993 to 987
Calculation steps:
[( 987 - 993 ) ÷ 993] x 100 = -0.6%
Formula
Percentage change = [(987 - 993) / 993] x 100
Subtract the new number by the original number
987 - 993 = -6
-6 ÷ 993 = -0.006042296072507553
-0.006042296072507553 x 100 = -0.6%