-98.35% is the change from 545 to 9
Calculation steps:
[( 9 - 545 ) ÷ 545] x 100 = -98.35%
Formula
Percentage change = [(9 - 545) / 545] x 100
Subtract the new number by the original number
9 - 545 = -536
-536 ÷ 545 = -0.9834862385321101
-0.9834862385321101 x 100 = -98.35%