-98.71% is the change from 543 to 7
Calculation steps:
[( 7 - 543 ) ÷ 543] x 100 = -98.71%
Formula
Percentage change = [(7 - 543) / 543] x 100
Subtract the new number by the original number
7 - 543 = -536
-536 ÷ 543 = -0.9871086556169429
-0.9871086556169429 x 100 = -98.71%