-27.1% is the change from 1000 to 729
Calculation steps:
[( 729 - 1000 ) ÷ 1000] x 100 = -27.1%
Formula
Percentage change = [(729 - 1000) / 1000] x 100
Subtract the new number by the original number
729 - 1000 = -271
-271 ÷ 1000 = -0.271
-0.271 x 100 = -27.1%