-1.78% is the change from 505 to 496
Calculation steps:
[( 496 - 505 ) ÷ 505] x 100 = -1.78%
Formula
Percentage change = [(496 - 505) / 505] x 100
Subtract the new number by the original number
496 - 505 = -9
-9 ÷ 505 = -0.01782178217821782
-0.01782178217821782 x 100 = -1.78%