-3.39% is the change from 502 to 485
Calculation steps:
[( 485 - 502 ) ÷ 502] x 100 = -3.39%
Formula
Percentage change = [(485 - 502) / 502] x 100
Subtract the new number by the original number
485 - 502 = -17
-17 ÷ 502 = -0.03386454183266932
-0.03386454183266932 x 100 = -3.39%