Step-by-step explanation:
The ratio a:b can be represented as a by b ie. a/b.
Here, a is called the antecedent and b is called the consequent.
Here, b = 15 (The consequent is equal to 15 according to the question).
So the required ratio is of the form a/15
And this ratio reduces to 3/5.
Therefore, a/15 = 3/5
Simplify and you will get: a = (15 x 3) / 5 = 45/5 = 9
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