-92.63% is the change from 990 to 73
Calculation steps:
[( 73 - 990 ) ÷ 990] x 100 = -92.63%
Formula
Percentage change = [(73 - 990) / 990] x 100
Subtract the new number by the original number
73 - 990 = -917
-917 ÷ 990 = -0.9262626262626262
-0.9262626262626262 x 100 = -92.63%