Question

9/20 divided by 4/15 is what

Answer 1

9/20 / 4/15

9/20 * 15/4

9/5 * 3/4

27/20
    or
1 7/20

Answer 2

$\frac{9}{20}$ divided by $\frac{4}{15}$

is the same as 

$\frac{9}{20}* \frac{15}{4}$

Now you just have to multiply the top by each other and the bottom by each other so 
$\frac{9*15}{20*4}$

== $\frac{135}{80}$

== $\frac{27}{16}$ 

Mixed Fraction would be $1 \frac{11}{16}$
and Decimal would be 1.6875