Is there a database of the percentage chances of pulling certain cards from packs? Trying to get a Resonating Lute

I'm trying to get a Resonating Lute for my Izzet decks from the SOS set but I can't find one anywhere from any retailers or third parties available right now in my area. Is there some database that describes percentage chances or of how many of a certain cards are out in the wild in packs to get? I've pulled good stuff from booster packs before but I stopped buying boosters a while ago and just bought singles. But I wonder how many packs I'd have to rip for the chance of finding a Resonating Lute for example.