-16.2% is the change from 648 to 543
Calculation steps:
[( 543 - 648 ) ÷ 648] x 100 = -16.2%
Formula
Percentage change = [(543 - 648) / 648] x 100
Subtract the new number by the original number
543 - 648 = -105
-105 ÷ 648 = -0.16203703703703703
-0.16203703703703703 x 100 = -16.2%