-87.5% is the change from 584 to 73
Calculation steps:
[( 73 - 584 ) ÷ 584] x 100 = -87.5%
Formula
Percentage change = [(73 - 584) / 584] x 100
Subtract the new number by the original number
73 - 584 = -511
-511 ÷ 584 = -0.875
-0.875 x 100 = -87.5%
Example