-92.63% is the change from 991 to 73
Calculation steps:
[( 73 - 991 ) ÷ 991] x 100 = -92.63%
Formula
Percentage change = [(73 - 991) / 991] x 100
Subtract the new number by the original number
73 - 991 = -918
-918 ÷ 991 = -0.9263370332996973
-0.9263370332996973 x 100 = -92.63%