-5.94% is the change from 505 to 475
Calculation steps:
[( 475 - 505 ) ÷ 505] x 100 = -5.94%
Formula
Percentage change = [(475 - 505) / 505] x 100
Subtract the new number by the original number
475 - 505 = -30
-30 ÷ 505 = -0.0594059405940594
-0.0594059405940594 x 100 = -5.94%