-79.93% is the change from 817 to 164
Calculation steps:
[( 164 - 817 ) ÷ 817] x 100 = -79.93%
Formula
Percentage change = [(164 - 817) / 817] x 100
Subtract the new number by the original number
164 - 817 = -653
-653 ÷ 817 = -0.799265605875153
-0.799265605875153 x 100 = -79.93%