-90.58% is the change from 817 to 77
Calculation steps:
[( 77 - 817 ) ÷ 817] x 100 = -90.58%
Formula
Percentage change = [(77 - 817) / 817] x 100
Subtract the new number by the original number
77 - 817 = -740
-740 ÷ 817 = -0.9057527539779682
-0.9057527539779682 x 100 = -90.58%