If Lilly has 4.8 months to read 51 books, how many books does she read each week?

Question

I tried dividing 51 by 20.87 (4.8 months in week f0rm) and I got 2.4436990896, but how many books is that?

Answer 1

Lilly must read:    (51 books)/(4.8 months)

  ((51 books)/(4.8 months))  ((12 months)/(1 year))  ((1 year)/(52 weeks))    [note: Multiplicative Identity = 1]

  (51/4.8)(12)(1/52) books/week       [note:  months and year cancel out, leaving only books/week]

   2.45 books/week    This could be rounded to 2 1/2 books/week.

Answer 2

First convert months to weeks:

 4.8 months / 4 weeks per month= 19.2 weeks.

Next, to find the number of books per week, divide the total number of books by the number of weeks:

 51 books / 19.2 weeks= 2.65 books per week.

 

So she reads between 2 and a half and 3 books per week.

Answer 3

First we need to convert months to weeks.  Use the conversion factor:

 

1 month ≈ 4 weeks

 

 

4.5 × 4 = 18

 

 

This means that she has about 18 weeks to read 51 books.  To find out how many books she read for each week, we divide 51 by 18.

 

 

51 books / 18 weeks =  2.83 books / week

 

 

So for each week, she reads about 3 books.