-98.9% is the change from 543 to 6
Calculation steps:
[( 6 - 543 ) ÷ 543] x 100 = -98.9%
Formula
Percentage change = [(6 - 543) / 543] x 100
Subtract the new number by the original number
6 - 543 = -537
-537 ÷ 543 = -0.988950276243094
-0.988950276243094 x 100 = -98.9%