-16.86% is the change from 605 to 503
Calculation steps:
[( 503 - 605 ) ÷ 605] x 100 = -16.86%
Formula
Percentage change = [(503 - 605) / 605] x 100
Subtract the new number by the original number
503 - 605 = -102
-102 ÷ 605 = -0.16859504132231404
-0.16859504132231404 x 100 = -16.86%