To solve this, you can simply multiply the numerators together and multiply the denominators together.
5/15 x 3/18 = (5 x 3) / (15 x 18) = 15/270
However, this fraction can be further simplified. Both the numerator and denominator are divisible by 15, so we can divide them both by 15.
15/270 = 1/18
So, 5/15 x 3/18 simplifies to 1/18.
5/15 x 3/18
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