-16.6% is the change from 1000 to 834
Calculation steps:
[( 834 - 1000 ) ÷ 1000] x 100 = -16.6%
Formula
Percentage change = [(834 - 1000) / 1000] x 100
Subtract the new number by the original number
834 - 1000 = -166
-166 ÷ 1000 = -0.166
-0.166 x 100 = -16.6%