-0.18% is the change from 543 to 542
Calculation steps:
[( 542 - 543 ) ÷ 543] x 100 = -0.18%
Formula
Percentage change = [(542 - 543) / 543] x 100
Subtract the new number by the original number
542 - 543 = -1
-1 ÷ 543 = -0.001841620626151013
-0.001841620626151013 x 100 = -0.18%