Complex fractions
In general, a complex fraction is normally formed of two fractions, one on top of the other (the numerator, denominator, or both contain a fraction). It is actually a ratio of two fractions.
To convert this to a simple fraction, rewrite as division:
$${;4/5;}/{;2/3;}={4/5}÷{2/3}={4/5}×{3/2}=12/10$$
You can also just multiply the top numerator by the bottom denominator and the top denominator by the bottom numerator:
$${;4/5;}/{;2/3;}={4×3}/{5×2}=12/10$$
If only the numerator or the denominator contains a fraction, rewrite the other one as a fraction, and then divide or multiply:
$${;1/8;}/3={;1/8;}/{;3/1;}={1×1}/{8×3}=1/24$$
$${;7;}/{4/5}={{;7/1;}/{;4/5;}={7×5}/{1×4}=35/4$$
