Natural in Baccarat with an Ace?

I saw a casino promotion recently in Macau where players could receive a match play coupon for winning a bet with a natural 8 or 9, but one of the cards MUST be an ace. What is the liklihood of this? It seemed like they were giving away quite a few of these match play vouchers in my few hours at the table. Perhaps it is easy to acheive and therefore keeps players playing longer? I tried to find this answer on the site but could not find combinations for naturals in baccarat.

Quote: dxtess

I saw a casino promotion recently in Macau where players could receive a match play coupon for winning a bet with a natural 8 or 9, but one of the cards MUST be an ace. What is the liklihood of this? It seemed like they were giving away quite a few of these match play vouchers in my few hours at the table. Perhaps it is easy to acheive and therefore keeps players playing longer? I tried to find this answer on the site but could not find combinations for naturals in baccarat.

Nat 9 winner (ace,8) 0.010734845954279
Nat 8 winner (ace,7) 0.00961143506979
Total 0.020346281024069 or 1 in about 49.15 hands

(Ok I've edited this a few times after finding a few mistakes. I hope I finaly caught them all)