-32.9% is the change from 1000 to 671
Calculation steps:
[( 671 - 1000 ) ÷ 1000] x 100 = -32.9%
Formula
Percentage change = [(671 - 1000) / 1000] x 100
Subtract the new number by the original number
671 - 1000 = -329
-329 ÷ 1000 = -0.329
-0.329 x 100 = -32.9%