A 60 year old person has 1/20 risk to die during a certain year

The amount of sigarets smoked a day increases the risk with +1/20

Each cup of coffee lowers the risk with -0.2/20

If a certain 60 year old smokes 2 sigarets each day and drinks 3 cups of coffee what is his risk to die

==> Is this

1/20 + (2*1)/20 - (3*-0.2)/20 = 2,4/20 ?