Question

WILL FAN AND MEDAL!! HELP!!! (i always fan and medal btw)

Susan is creating a solution. A formula for the solution calls for 7/10 mL of water. Susan wants to make 2/7 less of the solution than the formula creates.

How much water should Susan use?

Express your answer as a fraction in simplest form.

Answer 1

So actually there is 7/10*5/7=1/2ml

Answer 2

oh, so that is the answer, I thought 1/2 is total solution then you have the concentration to figure out the water part

Answer 3

i hate this website now.. NO ONE HELPS UNLESS THEY ARE GONNA GET FANNED AND A MEDAL! this is why i lock myself in my room alone watching anime and listening to K-pop!

Answer 4

Fraction conversions. First find the least common denominator

Answer 5

Also, I don't give a flying flutter about a medal

Answer 6

^ Oh that's lame. You can't say the F word.... flutter?

Answer 7

Finally! Someone that doesn't want a medal!

Answer 8

Yah, it sucks, I tried once and it turned flutter too

Answer 9

BRUH!! WHY CAN'T WE SAY THE F WORD?!!

Answer 10

Anyways,

To find out the least common denominator, write out the multiples of 10 (So 10, 20, 30, 40, etc), then do the same for 7

Answer 11

I couldn't get any common factors bc they don't have any. well.. 10 does, but 7 would just be 1 and its self

Answer 12

Every number has multiples. You would just take the number and multiply it by 1, then 2, then 3, etc

Like for 10
10 x 1 = 10
10 x 2 = 20
10 x 3 = 30

and so on

10, 20, 30, etc are possible least common denominators

Answer 13

Oh, ok

Answer 14

A quicker way to find one is to multiply the denominators

In this case, we have 7 and 10, so what can one possible least common denominator be?

Answer 15

it would be... um... g-ah! idk

Answer 16

Since we have 7/10 and 2/7 and we want to multiply denominators: We have 10 as one denominator (Bottom part of a fraction) and the other would be 7, right?

So multiplying 7 and 10 would make 70. 70 would be a common denominator. As long as it's a common denominator, it will work

Answer 17

Oh!!!! okay!!

Answer 18

Alright awesome!

So now we have to convert. The rule is, whatever we do to the bottom, we also have to do to the top

Let's take it one step at a time and start with 7/10

What number did we multiply with 10 to get the number 70, out common denominator?

Answer 19

10 X 7 = 70

Answer 20

Right, we used 7. So to follow the rule, since we multiplied by 7 on the bottom, we also must multiply the top number by 7

The top number in 7/10 is 7. So we do 7 * 7 to get 49, creating 49/70 as one converted fraction!

Now for the second one, we do the same thing. What number did we multiply with 7 to get 70?

Answer 21

10

Answer 22

Right, so what would our new converted fraction be, seeing that the top number of 2/7 is 2?

Answer 23

it would be... um... ugh! idk! i'm horrible with math

Answer 24

Since you saw that we multiplied 10 with the 7 to get 70, you would also multiply the 10 with 2 to get our top number

Answer 25

Oh! ok so that would be 20

Answer 26

Exactly, giving us 20/70

Now we have 49/70, which we found earlier, and 20/70 which we just found.

Now, since you want to create 2/7 (Which is 20/70) LESS, would you add, subtract, multiply, or divide?

Answer 27

divide? idk

Answer 28

Let's use a variable example. Let's say I have 10 cookies. I decided to be fat and eat 9, so I have 9 LESS. How would I found out how many I need?

10 ____ 9 = 1

Answer 29

+ - * or /

Answer 30

-

Answer 31

Right! Which is subtraction

So now to find the answer to this, we subtract 49/70 - 20/70

When subtracting fractions, you only do it to the numerator. The denominator remains as it is.

Think you can figure what this would be

49 29 < -- Numerator = ?
-- - -- ---------- --
70 70 < -- Denominator = ?

Answer 32

I mean

20
--
70 , not 29

Answer 33

I figured it out! thanks so much!!

Answer 34

Anytime! I don't know why the first guy said 1/2 when it's not the answer lol. Take care