Simplify fraction - Where did the rest go? While studying maths I encountered the following fraction :
$\frac{5ab}{10b}$
Which I then had to simplify. The answer I came up with is:
$\frac{5ab}{10b} = \frac{ab}{2b}$
But the correct answer seemed to be:
$\frac{5ab}{10b} = \frac{a}{2} = \frac{1}{2}$a
Why is the above answer correct and mine wrong? I can't wrap my head around $b$ just disappearing like that.

It is because you left $b$ which is an integer in the fraction.
