\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)
In a classroom game, Noah picks a card from a deck containing 20 cards, each labeled with a different number from 1 to 20. Calculate the probability that Noah picks the card labeled "7", and express the result in decimal form.
\( P(\text{"picking the card labeled 7"}) = \)