-17.1% is the change from 1000 to 829
Calculation steps:
[( 829 - 1000 ) ÷ 1000] x 100 = -17.1%
Formula
Percentage change = [(829 - 1000) / 1000] x 100
Subtract the new number by the original number
829 - 1000 = -171
-171 ÷ 1000 = -0.171
-0.171 x 100 = -17.1%