Question 394515
Hi there :D

To solve/simplify this problem, you must pull out a common factor from both the numerator and the denominator.  

You can pull out {{{ab^3}}} from the numerator and the denominator.

{{{ab^3 (a^4) / ab^3 (b)}}}

Next, you can cancel out {{{ab^3}}} and you will be left with the answer

{{{a^4 / b}}}


- Eric Li :D