-11.21% is the change from 821 to 729
Calculation steps:
[( 729 - 821 ) ÷ 821] x 100 = -11.21%
Formula
Percentage change = [(729 - 821) / 821] x 100
Subtract the new number by the original number
729 - 821 = -92
-92 ÷ 821 = -0.1120584652862363
-0.1120584652862363 x 100 = -11.21%