fraction question baking

[Redmoon]

Hey would this working and answer be correct?

The question
A bag of flour contains 5 and 4/7 pounds, to bake a cake will use 2 and 3/8 pounds, how much is left in the bag? (simplify where possible, expressing the number in mixed form)

= (5 - 2) + (4/7 - 3/8)

= 3 + (32/56 - 21/56)

= 3 + (11/56) pounds left

Would 11/56 be the correct answer as it asks for it in mixed number form? or have I went wrong somewhere thanks.

 

[Otis]

Would 11/56 be the correct answer as it asks for it in mixed number form?

Hi Redmoon. I'm guessing that you meant to type 3 and 11/56.

Yes, [imath]3\frac{11}{56}[/imath] is the correct answer, and your work is good.

Here's an easy^† way to check such results: Google each of the following (or use a calculator with built-in grouping symbols) and compare the decimal results.

(5+4/7)–(2+3/8)

3+11/56

Cheers ?

^† Edited

[imath]\;[/imath]

 

[Steven G]

Would you be able to answer this question?
5 4/7 - 2 7/8

 

[Deleted member 4993]

Hi Redmoon. I'm guessing that you meant to type 3 and 11/56.

Yes, [imath]3\frac{11}{56}[/imath] is the correct answer, and your work is good.

Here's a way to check your result. Google each of the following (or use a calculator with built-in grouping symbols) and compare the decimal results.

(5+4/7) – (2+3/8)

3+11/56

Cheers ?

[imath]\;[/imath]

In my opinion, check of work would be:

(3+11/56) + (2+3/8)

= (3+2) + (11/56 + 3/8)

= (5) + [11/56 + (3*7)/56]

= 5 + (32/56)

= 5 + 4/7 [checks]

 

[The Highlander]

Hey would this working and answer be correct?
Would 11/56 be the correct answer as it asks for it in mixed number form? or have I went wrong somewhere thanks.

Your arithmetic is fine (it has already been pointed out that a 'mixed number' is a whole number plus a common fraction, hence the final answer is [imath]3\frac{11}{56}[/imath]); it's just your English that's bad!
It should be "have I gone wrong" never "have I went wrong"!
(I'm sorry but confusing the past tense with the past participle really irks me! ???
Even in a Maths Forum.)