-13.52% is the change from 821 to 710
Calculation steps:
[( 710 - 821 ) ÷ 821] x 100 = -13.52%
Formula
Percentage change = [(710 - 821) / 821] x 100
Subtract the new number by the original number
710 - 821 = -111
-111 ÷ 821 = -0.13520097442143728
-0.13520097442143728 x 100 = -13.52%