Carlo buys $14.40 worth of grapefruit. each grapefruit costs $0.80.
a. how many grapefruits does carlo buy?
b. at the same store, kahri spends one-third as much money on grapefruits as carlo. how many grapefruits does she buy?

Step-by-step explanation:

a. Let be "x" the number of grapefruits Carlo buys.

You know that the cost of one grapefruit is $0.80.

Knowing that Carlo buys $14.40 of grapefuit, you can set up the following proportion:

Solving for "x", you get:

b. Since Kahri spends one-third as much money on grapefruits as Carlo, you need to multiply 18 grapefruits by in order to calculate the number of grapefruits she buys. Then:

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