We read  pages .
Step-by-step explanation:
Correct Question: You have to read 10 1/2 pages for homework. So far, you have read 1/3 of the assignment. How many pages did you read?
We have , to read 10 1/2 pages or pages for homework . Till now we have read 1/3 of the assignment or of the assignment . We need to find  How many pages did you read . Let's find out:
Basically we read 1/3 part of the 10 1/2 pages assignment i.e.
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⇒ pages
Therefore , We read  pages .