Greetings from Brasil...
Here's our problem:
[tex]\large{\frac{12^{16}}{12^{4}}}[/tex]
From potentiation properties:
Mᵃ ÷ Mᵇ = Mᵃ⁻ᵇ
division of power of the same base: I repeat the base and subtract the exponents
Bringing to our problem
12¹⁶ ÷ 12⁴
12¹⁶⁻⁴
12¹²
