-3.19% is the change from 501 to 485
Calculation steps:
[( 485 - 501 ) ÷ 501] x 100 = -3.19%
Formula
Percentage change = [(485 - 501) / 501] x 100
Subtract the new number by the original number
485 - 501 = -16
-16 ÷ 501 = -0.031936127744510975
-0.031936127744510975 x 100 = -3.19%