-87.1% is the change from 566 to 73
Calculation steps:
[( 73 - 566 ) ÷ 566] x 100 = -87.1%
Formula
Percentage change = [(73 - 566) / 566] x 100
Subtract the new number by the original number
73 - 566 = -493
-493 ÷ 566 = -0.8710247349823321
-0.8710247349823321 x 100 = -87.1%