-86.19% is the change from 478 to 66
Calculation steps:
[( 66 - 478 ) ÷ 478] x 100 = -86.19%
Formula
Percentage change = [(66 - 478) / 478] x 100
Subtract the new number by the original number
66 - 478 = -412
-412 ÷ 478 = -0.8619246861924686
-0.8619246861924686 x 100 = -86.19%