-89.8% is the change from 539 to 55
Calculation steps:
[( 55 - 539 ) ÷ 539] x 100 = -89.8%
Formula
Percentage change = [(55 - 539) / 539] x 100
Subtract the new number by the original number
55 - 539 = -484
-484 ÷ 539 = -0.8979591836734694
-0.8979591836734694 x 100 = -89.8%