-86.16% is the change from 477 to 66
Calculation steps:
[( 66 - 477 ) ÷ 477] x 100 = -86.16%
Formula
Percentage change = [(66 - 477) / 477] x 100
Subtract the new number by the original number
66 - 477 = -411
-411 ÷ 477 = -0.8616352201257862
-0.8616352201257862 x 100 = -86.16%