-11.33% is the change from 821 to 728
Calculation steps:
[( 728 - 821 ) ÷ 821] x 100 = -11.33%
Formula
Percentage change = [(728 - 821) / 821] x 100
Subtract the new number by the original number
728 - 821 = -93
-93 ÷ 821 = -0.11327649208282582
-0.11327649208282582 x 100 = -11.33%