-91.02% is the change from 813 to 73
Calculation steps:
[( 73 - 813 ) ÷ 813] x 100 = -91.02%
Formula
Percentage change = [(73 - 813) / 813] x 100
Subtract the new number by the original number
73 - 813 = -740
-740 ÷ 813 = -0.9102091020910209
-0.9102091020910209 x 100 = -91.02%