-97.79% is the change from 543 to 12
Calculation steps:
[( 12 - 543 ) ÷ 543] x 100 = -97.79%
Formula
Percentage change = [(12 - 543) / 543] x 100
Subtract the new number by the original number
12 - 543 = -531
-531 ÷ 543 = -0.9779005524861878
-0.9779005524861878 x 100 = -97.79%