-3.4% is the change from 1000 to 966
Calculation steps:
[( 966 - 1000 ) ÷ 1000] x 100 = -3.4%
Formula
Percentage change = [(966 - 1000) / 1000] x 100
Subtract the new number by the original number
966 - 1000 = -34
-34 ÷ 1000 = -0.034
-0.034 x 100 = -3.4%