-1.58% is the change from 505 to 497
Calculation steps:
[( 497 - 505 ) ÷ 505] x 100 = -1.58%
Formula
Percentage change = [(497 - 505) / 505] x 100
Subtract the new number by the original number
497 - 505 = -8
-8 ÷ 505 = -0.015841584158415842
-0.015841584158415842 x 100 = -1.58%