-6.1% is the change from 1000 to 939
Calculation steps:
[( 939 - 1000 ) ÷ 1000] x 100 = -6.1%
Formula
Percentage change = [(939 - 1000) / 1000] x 100
Subtract the new number by the original number
939 - 1000 = -61
-61 ÷ 1000 = -0.061
-0.061 x 100 = -6.1%