5/15 x 3/18

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.