-10.96% is the change from 821 to 731
Calculation steps:
[( 731 - 821 ) ÷ 821] x 100 = -10.96%
Formula
Percentage change = [(731 - 821) / 821] x 100
Subtract the new number by the original number
731 - 821 = -90
-90 ÷ 821 = -0.10962241169305725
-0.10962241169305725 x 100 = -10.96%