-13.9% is the change from 1000 to 861
Calculation steps:
[( 861 - 1000 ) ÷ 1000] x 100 = -13.9%
Formula
Percentage change = [(861 - 1000) / 1000] x 100
Subtract the new number by the original number
861 - 1000 = -139
-139 ÷ 1000 = -0.139
-0.139 x 100 = -13.9%