-83.37% is the change from 439 to 73
Calculation steps:
[( 73 - 439 ) ÷ 439] x 100 = -83.37%
Formula
Percentage change = [(73 - 439) / 439] x 100
Subtract the new number by the original number
73 - 439 = -366
-366 ÷ 439 = -0.8337129840546698
-0.8337129840546698 x 100 = -83.37%