-84.35% is the change from 543 to 85
Calculation steps:
[( 85 - 543 ) ÷ 543] x 100 = -84.35%
Formula
Percentage change = [(85 - 543) / 543] x 100
Subtract the new number by the original number
85 - 543 = -458
-458 ÷ 543 = -0.8434622467771639
-0.8434622467771639 x 100 = -84.35%