-3.21% is the change from 561 to 543
Calculation steps:
[( 543 - 561 ) ÷ 561] x 100 = -3.21%
Formula
Percentage change = [(543 - 561) / 561] x 100
Subtract the new number by the original number
543 - 561 = -18
-18 ÷ 561 = -0.03208556149732621
-0.03208556149732621 x 100 = -3.21%