-12.67% is the change from 821 to 717
Calculation steps:
[( 717 - 821 ) ÷ 821] x 100 = -12.67%
Formula
Percentage change = [(717 - 821) / 821] x 100
Subtract the new number by the original number
717 - 821 = -104
-104 ÷ 821 = -0.12667478684531058
-0.12667478684531058 x 100 = -12.67%