-11.22% is the change from 820 to 728
Calculation steps:
[( 728 - 820 ) ÷ 820] x 100 = -11.22%
Formula
Percentage change = [(728 - 820) / 820] x 100
Subtract the new number by the original number
728 - 820 = -92
-92 ÷ 820 = -0.11219512195121951
-0.11219512195121951 x 100 = -11.22%