-89.09% is the change from 495 to 54
Calculation steps:
[( 54 - 495 ) ÷ 495] x 100 = -89.09%
Formula
Percentage change = [(54 - 495) / 495] x 100
Subtract the new number by the original number
54 - 495 = -441
-441 ÷ 495 = -0.8909090909090909
-0.8909090909090909 x 100 = -89.09%