Blackjack Probability Question

Suppose there was a 21 game in progress involving just the dealer and one player: Assume on a round of play that the dealer does not have a blackjack and the player has a 2-card 20. What percentage of the time will the dealer reach 21 and beat the player? Obviously all the hands where the dealer starts with a 2-card hard 17 through 20 would not beat the player--it would have to be a hand where the dealer has to draw. Let's assume a H17, DD game.

Would it be close to 7.6% of the time? Could anyone help me with this question?

This might help: Blackjack appendix 2a, Probabilities of dealer hand after peek. See: https://wizardofodds.com/games/blackjack/appendix/2a/.

Fixed: https://wizardofodds.com/games/blackjack/appendix/2a/

Looks to be 7.892% frequency. Although that doesn't take into account the missing TT or A9 (player's 2-card 20).

Thanks for the help Dan and RS.