Sarah needs to make a cake and some cookies. The cake requires 3/8 cup of sugar and the cookies require 3/5 cup of sugar. Sarah has 15/16 cups of sugar. Does she have enough sugar, or how much more does she need?

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Sarah needs to make a cake and some cookies. The cake requires 3/8 cup of sugar and the cookies require 3/5 cup of sugar. Sarah has 15/16 cups of sugar. Does she have enough sugar, or how much more does she need?

Mathematics
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At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

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So in order to do this problem you will need to make the denominators like terms because this is an addition problem.
30?
3/8 + 3/5 = 15/16 ... would be the equation to this

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The common denominator cannot be 30 because 16 and 8 don't multiply evenly into it.
Let's take this in chunks. Can you think of anything common that 5 and 8 can multiply into?
40 ...
yeah
i was getting 6 x5 and 8x5 backwards
Haha, no worries. Do you know how to take 3/8 and turn it into a fraction over 40?
yeah 8 goes into 40 5times so 5 times 3 =15 15/40
Exactly. Now do the same for the 3/5?
24/40
Perfect. So now we can actually add. 15/40 + 24/40 = ?
actually while we are at it ... how do you figure out the smallest common denominator? i always had a hard time with that. wasnt it something about prime numbers?
or would it be better to make it a new question?
39/40
Oh no, I can answer it. If it takes you a while to figure it out, it's more than likely the lowest common denominator is some random number we don't know off the tops of our heads. I wouldn't bother with it in that case, just use 8*5*16 as the common denominator and then work from there.
ok so how much more sugar does she need and how do we determine that?
subract 39/40 and 15/16
wasnt there a simple rule to figure it out? i remember me doing this in 6th grade i think.
You have to figure out if 39/40 < 15/16, and if it is, she doesn't have enough.
So you must compare with like denominators. Once you have a common denominator for 40 and 16, you can compare with ease.
I'm really sorry, but I'm at school and the period is up. I have to go.
ok thanks
And yes, she does have enough ;)
.975 > .9375
See you later!

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