What are these fractions in simplest form?

( when I do a / it means a "fraction bar" or " over" like 16/30 or 16 over 30, just incase any of you get confused) but if you could help me simplify these that would be great!!


16y3/20y4 (that's a y to the third power for sixteen and a y to the fourth power for twenty)


6xy/16y


Abc/10abc


Mn2/pm5n (that's an n to the second power for nm and a m to the fifth power on pmn)


12h3k/16h2k2 ( that's a h to the third power for 12hk and a h to the second power and k to the second power for 16hk


8x/10y


24n2/28n ( that's a n to the second power)


30hxy/54kxy


5jh/15jh3 (that's a h to the third power for 15jh)


20s2t3/16st5 ( that's a a to the second power and t to the third power for 20st and t to the fifth power for 16st)