Question

To mix weed killer with water​ correctly, it is necessary to mix 15 teaspoons of weed killer with 3 gallons of water. Find how many gallons of water are needed to mix with the entire box if it contains 40 teaspoons of weed killer.

Answer 1

40 teaspoons is 2 2/3 times 15 teaspoons, so will need to be mixed with 2 2/3 times as much water.

... 2 2/3 × 3 gallons = 8 gallons

8 gallons of water are needed to mix with 40 tsp of weed killer.

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40/15 = 8/3 = 2 2/3