Last year at Roberts Middle School, 11/30 of the books in the library were more than 50 years old. At the end of the year, 1/10 of those books were given to charity. What fraction of all the books was given to charity?

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Answer 1 · 2017-06-11T23:02:46

See a solution process below:

We can write this problem as: What is 1/10 of 11/30?

Let's call the fraction of books we are looking for: #b#;

The word "of" in this context dealing with fractions means to multiply.

We can write this problem as:

#b = 1/10 xx 11/30#

#b = (1 xx 11)/(10 xx 30)#

#b = 11/300#