Answer:
(a)

(b)

Explanation:
" The ratio a:b can be represented as a by b i.e. a/b. Here, a is called the antecedent and b is called the consequent "
(a)
The antecedent is 3 and the consequent is 10.
i.e. a=3 and b=10.
Hence, the ratio or fraction could be written as:

Hence
is the required ratio.
(b)
The antecedent is 15 and the consequent is 11.
i.e. a=15 and b=11.
Hence the ratio or fraction could be written as:

Hence, the required fraction is:
