-89.98% is the change from 539 to 54
Calculation steps:
[( 54 - 539 ) ÷ 539] x 100 = -89.98%
Formula
Percentage change = [(54 - 539) / 539] x 100
Subtract the new number by the original number
54 - 539 = -485
-485 ÷ 539 = -0.8998144712430427
-0.8998144712430427 x 100 = -89.98%