-90.29% is the change from 824 to 80
Calculation steps:
[( 80 - 824 ) ÷ 824] x 100 = -90.29%
Formula
Percentage change = [(80 - 824) / 824] x 100
Subtract the new number by the original number
80 - 824 = -744
-744 ÷ 824 = -0.9029126213592233
-0.9029126213592233 x 100 = -90.29%