-33.3% is the change from 1000 to 667
Calculation steps:
[( 667 - 1000 ) ÷ 1000] x 100 = -33.3%
Formula
Percentage change = [(667 - 1000) / 1000] x 100
Subtract the new number by the original number
667 - 1000 = -333
-333 ÷ 1000 = -0.333
-0.333 x 100 = -33.3%