-0.5% is the change from 605 to 602
Calculation steps:
[( 602 - 605 ) ÷ 605] x 100 = -0.5%
Formula
Percentage change = [(602 - 605) / 605] x 100
Subtract the new number by the original number
602 - 605 = -3
-3 ÷ 605 = -0.0049586776859504135
-0.0049586776859504135 x 100 = -0.5%