Tom spent 1/3 of his allowance at mall. Of the money he spent at the mall, he spent 3/5 of it on jeans. What fractions of his allowance did Tom spend on jeans?

(1/3) * (3/5) = 3/15 = 1/5

21dv

To find the fraction of Tom's allowance that he spent on jeans, we need to multiply the fraction of his allowance that he spent at the mall by the fraction of the money he spent at the mall on jeans.

Tom spent 1/3 of his allowance at the mall, so the fraction he spent at the mall is 1/3.

Next, we multiply this fraction by the fraction of the money he spent on jeans, which is 3/5.

(1/3) * (3/5) = 3/15

Therefore, Tom spent 3/15 of his allowance on jeans.