Answer
$P(does~not~trust~organized~religion)=0.82$
Work Step by Step
$P(trusts~organized~religion)=0.18$
The event "does not trust organized religion" is the complement of "trusts organized religion".
Using the Complement Rule (see page 275):
$P(does~not~trust~organized~religion)=1-P(trusts~organized~religion)=1-0.18=0.82$
