-90.06% is the change from 543 to 54
Calculation steps:
[( 54 - 543 ) ÷ 543] x 100 = -90.06%
Formula
Percentage change = [(54 - 543) / 543] x 100
Subtract the new number by the original number
54 - 543 = -489
-489 ÷ 543 = -0.9005524861878453
-0.9005524861878453 x 100 = -90.06%