-96.69% is the change from 543 to 18
Calculation steps:
[( 18 - 543 ) ÷ 543] x 100 = -96.69%
Formula
Percentage change = [(18 - 543) / 543] x 100
Subtract the new number by the original number
18 - 543 = -525
-525 ÷ 543 = -0.9668508287292817
-0.9668508287292817 x 100 = -96.69%