-91.09% is the change from 819 to 73
Calculation steps:
[( 73 - 819 ) ÷ 819] x 100 = -91.09%
Formula
Percentage change = [(73 - 819) / 819] x 100
Subtract the new number by the original number
73 - 819 = -746
-746 ÷ 819 = -0.9108669108669109
-0.9108669108669109 x 100 = -91.09%