-85.27% is the change from 543 to 80
Calculation steps:
[( 80 - 543 ) ÷ 543] x 100 = -85.27%
Formula
Percentage change = [(80 - 543) / 543] x 100
Subtract the new number by the original number
80 - 543 = -463
-463 ÷ 543 = -0.852670349907919
-0.852670349907919 x 100 = -85.27%