-7% is the change from 543 to 505
Calculation steps:
[( 505 - 543 ) ÷ 543] x 100 = -7%
Formula
Percentage change = [(505 - 543) / 543] x 100
Subtract the new number by the original number
505 - 543 = -38
-38 ÷ 543 = -0.06998158379373849
-0.06998158379373849 x 100 = -7%