-6.63% is the change from 543 to 507
Calculation steps:
[( 507 - 543 ) ÷ 543] x 100 = -6.63%
Formula
Percentage change = [(507 - 543) / 543] x 100
Subtract the new number by the original number
507 - 543 = -36
-36 ÷ 543 = -0.06629834254143646
-0.06629834254143646 x 100 = -6.63%