She has been with her book club for 49 months.
Step-by-step explanation:
Books read = 12 books
Time period = 7 months
Therefore,
12 books = 7 months
1 book = [tex]\frac{7}{12}\ months[/tex]
Books read so far = 84 books
Total time period = x
84 books = x months
1 book = [tex]\frac{x}{84}\ months[/tex]
Using both unit rates;
[tex]\frac{x}{84}=\frac{7}{12}\\x=\frac{7}{12}*84\\x=\frac{588}{12}\\x=49\ months[/tex]
She has been with her book club for 49 months.
Keywords: Unit rates, multiplication
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