At an aquarium, 6 out of 18 deliveries are plants. The aquarium is making 15 deliveries next week and wants to use a proportion to determine how many of those will be plants.

I think 5 of the 15 deliveries are plants.

Step-by-step explanation:

I divided 6 by 18 to get 3.4 (I rounded up), which translates to 34%. 34% of 15 is 5.1, I rounded to get 5.

I checked my work by getting 34% of 18, which is 6.12 and would round to 6.