-89.75% is the change from 439 to 45
Calculation steps:
[( 45 - 439 ) ÷ 439] x 100 = -89.75%
Formula
Percentage change = [(45 - 439) / 439] x 100
Subtract the new number by the original number
45 - 439 = -394
-394 ÷ 439 = -0.89749430523918
-0.89749430523918 x 100 = -89.75%