Simplify the expresion. The simplified expression should not have negative exponents.

Answer:
It's been a while since I've done this but think the answer is
[tex] {y}^{16} [/tex]
Step-by-step explanation:
[tex] \frac{ {y}^{ - 20} }{ {y}^{ - 36} } \\ { y}^{ - 20} - {y}^{ - 36} \\ {y}^{16} [/tex]