Sorry if this has already been posted, but can someone share the easiest way to get this one?

[HughJanus]

I feel like I’m so close but I can’t get it. (From Big Book p.77)

[HoldMyBeer]

99^9 =(11\times9)^9 = 11^9 \times 9^9

Hint: can do some manipulation do the denominator to eliminate that 9^9

[Leaderboard]

99⁹ = 9⁹ × 11⁹ and 9⁹⁹ = 9⁹⁰ × 9⁹

[HughJanus]

Sweet, thank you!!