Brent divided $3 1/5$ by a number and got $4 1/2$ . What number did he divide by?

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Answer 1 · 2016-03-29T14:57:56

The number divided by was $32/45$

Let the unknown number be $x$

Then $3 1/5 -: x = 4 1/2$

Write as

$" " 16/5 -:x= 9/2$

Suppose we had the common denominator of 10 then we would have:

$" "32/10 -:x = 45/10$

Get rid of the 10: multiply through out by 10 giving:

$" "32-:x=45$

$=>32/x=45$

$=>x=32/45$

Brent divided 3 1/53 1/5 by a number and got 4 1/24 1/2. What number did he divide by?