-91.13% is the change from 823 to 73
Calculation steps:
[( 73 - 823 ) ÷ 823] x 100 = -91.13%
Formula
Percentage change = [(73 - 823) / 823] x 100
Subtract the new number by the original number
73 - 823 = -750
-750 ÷ 823 = -0.9113001215066828
-0.9113001215066828 x 100 = -91.13%