-45.32% is the change from 993 to 543
Calculation steps:
[( 543 - 993 ) ÷ 993] x 100 = -45.32%
Formula
Percentage change = [(543 - 993) / 993] x 100
Subtract the new number by the original number
543 - 993 = -450
-450 ÷ 993 = -0.45317220543806647
-0.45317220543806647 x 100 = -45.32%