-1.11% is the change from 990 to 979
Calculation steps:
[( 979 - 990 ) ÷ 990] x 100 = -1.11%
Formula
Percentage change = [(979 - 990) / 990] x 100
Subtract the new number by the original number
979 - 990 = -11
-11 ÷ 990 = -0.011111111111111112
-0.011111111111111112 x 100 = -1.11%