-94.52% is the change from 821 to 45
Calculation steps:
[( 45 - 821 ) ÷ 821] x 100 = -94.52%
Formula
Percentage change = [(45 - 821) / 821] x 100
Subtract the new number by the original number
45 - 821 = -776
-776 ÷ 821 = -0.9451887941534713
-0.9451887941534713 x 100 = -94.52%