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The Miller Family shares a cell phone plan. Last month, Jodie used 3/4 of the minutes. Her son Billy used 4/5 of the remaining minutes. What fraction of the minutes did Billy use?

Answer :

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Answer: The fraction of the minutes did Billy use = [tex]\dfrac15[/tex].

Step-by-step explanation:

Let x = Total minutes given in the plan.

Last month, Jodie used [tex]\dfrac34[/tex] of the minutes.

Remaining minutes = [tex]x-\dfrac34x=\dfrac14x[/tex]

Billy used = [tex]\dfrac45(\dfrac14x)=\dfrac{x}{5}[/tex]  minutes

Fraction of the minutes used by Billy = [tex]\dfrac{\dfrac{x}{5}}{x}=\dfrac15[/tex]

Hence, the fraction of the minutes did Billy use = [tex]\dfrac15[/tex].

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