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Claire is saving up to buy a new laptop that costs $849. She has $232 and is saving $28 each week. How many full weeks will it take for her to save enough money to buy the laptop? Explain your reasoning using words and numbers.

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musiclover10045

Subtract the amount she has saved from the price of the laptop:

849 - 232 = 617

Now divide the amount she still needs by the amount she saves per week:

617 / 28 = 22.04

Because the answer has a number to the right of the decimal, she will need to save for 23 full weeks to have enough money.

If she saves for 22 weeks, she would be $1 short:

22 x 28 = 616 + 232 = 848

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