-33.86% is the change from 821 to 543
Calculation steps:
[( 543 - 821 ) ÷ 821] x 100 = -33.86%
Formula
Percentage change = [(543 - 821) / 821] x 100
Subtract the new number by the original number
543 - 821 = -278
-278 ÷ 821 = -0.3386114494518879
-0.3386114494518879 x 100 = -33.86%