-32.13% is the change from 800 to 543
Calculation steps:
[( 543 - 800 ) ÷ 800] x 100 = -32.13%
Formula
Percentage change = [(543 - 800) / 800] x 100
Subtract the new number by the original number
543 - 800 = -257
-257 ÷ 800 = -0.32125
-0.32125 x 100 = -32.13%