-71.3% is the change from 1000 to 287
Calculation steps:
[( 287 - 1000 ) ÷ 1000] x 100 = -71.3%
Formula
Percentage change = [(287 - 1000) / 1000] x 100
Subtract the new number by the original number
287 - 1000 = -713
-713 ÷ 1000 = -0.713
-0.713 x 100 = -71.3%