-91.64% is the change from 873 to 73
Calculation steps:
[( 73 - 873 ) ÷ 873] x 100 = -91.64%
Formula
Percentage change = [(73 - 873) / 873] x 100
Subtract the new number by the original number
73 - 873 = -800
-800 ÷ 873 = -0.9163802978235968
-0.9163802978235968 x 100 = -91.64%