-90.86% is the change from 821 to 75
Calculation steps:
[( 75 - 821 ) ÷ 821] x 100 = -90.86%
Formula
Percentage change = [(75 - 821) / 821] x 100
Subtract the new number by the original number
75 - 821 = -746
-746 ÷ 821 = -0.9086479902557856
-0.9086479902557856 x 100 = -90.86%