Answer:
6 books in 7 weeks
12 books in 14 weeks
Step-by-step explanation:
We can first create a ratio:
18:21
Now we can simplify it:
6:7
She can read 6 books in 7 weeks.
If we want to find how many she reads in 14 weeks we multiply the ratio by 2.
12:14
She can read 12 books in 14 weeks.
Answer:
6, 12
Step-by-step explanation:
You actually don't need to find a unit rate for this. You know that 21 is divisible by 7 and 14 is a multiple of 7. If you write the fractions like this:
[tex]\frac{Books}{weeks}[/tex], then: [tex]\frac{18}{21}\\[/tex] is the first piece of info given. We next need to find how many books she reading 7 weeks, and we know that 21÷3=7, so:
[tex]\frac{18}{21}\\[/tex]÷[tex]\frac{3}{3}[/tex]=[tex]\frac{6}{7}[/tex]. 7 is the number of weeks, 6 is the number of books. Then to find 14 weeks we know that 7×2 is 14, so:
[tex]\frac{6}{7}[/tex]×[tex]\frac{2}{2}[/tex]=[tex]\frac{12}{14}[/tex]. 14 is the number of weeks, 12 is the number of books.
Hope this helps!
