-79.54% is the change from 821 to 168
Calculation steps:
[( 168 - 821 ) ÷ 821] x 100 = -79.54%
Formula
Percentage change = [(168 - 821) / 821] x 100
Subtract the new number by the original number
168 - 821 = -653
-653 ÷ 821 = -0.7953714981729598
-0.7953714981729598 x 100 = -79.54%