-90.74% is the change from 821 to 76
Calculation steps:
[( 76 - 821 ) ÷ 821] x 100 = -90.74%
Formula
Percentage change = [(76 - 821) / 821] x 100
Subtract the new number by the original number
76 - 821 = -745
-745 ÷ 821 = -0.9074299634591961
-0.9074299634591961 x 100 = -90.74%