-83.51% is the change from 485 to 80
Calculation steps:
[( 80 - 485 ) ÷ 485] x 100 = -83.51%
Formula
Percentage change = [(80 - 485) / 485] x 100
Subtract the new number by the original number
80 - 485 = -405
-405 ÷ 485 = -0.8350515463917526
-0.8350515463917526 x 100 = -83.51%