-1.21% is the change from 993 to 981
Calculation steps:
[( 981 - 993 ) ÷ 993] x 100 = -1.21%
Formula
Percentage change = [(981 - 993) / 993] x 100
Subtract the new number by the original number
981 - 993 = -12
-12 ÷ 993 = -0.012084592145015106
-0.012084592145015106 x 100 = -1.21%