-85.23% is the change from 447 to 66
Calculation steps:
[( 66 - 447 ) ÷ 447] x 100 = -85.23%
Formula
Percentage change = [(66 - 447) / 447] x 100
Subtract the new number by the original number
66 - 447 = -381
-381 ÷ 447 = -0.8523489932885906
-0.8523489932885906 x 100 = -85.23%