-16.53% is the change from 605 to 505
Calculation steps:
[( 505 - 605 ) ÷ 605] x 100 = -16.53%
Formula
Percentage change = [(505 - 605) / 605] x 100
Subtract the new number by the original number
505 - 605 = -100
-100 ÷ 605 = -0.1652892561983471
-0.1652892561983471 x 100 = -16.53%