-2.42% is the change from 990 to 966
Calculation steps:
[( 966 - 990 ) ÷ 990] x 100 = -2.42%
Formula
Percentage change = [(966 - 990) / 990] x 100
Subtract the new number by the original number
966 - 990 = -24
-24 ÷ 990 = -0.024242424242424242
-0.024242424242424242 x 100 = -2.42%