Question

seven-ninths subtract one-third

Answer 1

What's the common denominator?

Answer 2

Its A Fraction

Answer 3

I know. To add or subtract fractions, we need a common denominator. What's the common denominator in this problem?

Answer 4

I dont know am i dumb

Answer 5

Don't say that. Look, we need a denominator that has has factors of nine and three. Can you think of a number that meets that specification?

Answer 6

3 and 6 ????

Answer 7

No, six doesn't go into nine, and nine won't go into three. We are looking for the smallest number that is a multiple of both nine and three. Do you think you know it now?

Answer 8

How about nine?

Answer 9

Okay

Answer 10

Nine goes into nine, and three goes into nine. Ok?

Answer 11

So we need to change one third into ninths. Do you know how to do that?

Answer 12

No

Answer 13

Well, what do we need to multiply three by to get nine?

Answer 14

Okay so 3*3 equals 9ine

Answer 15

Great. Now we take 1/3 and multiply both the numerator and denominator by three. We multiply both by the same number so that the value of the fraction isn't changed. What do we get?

Answer 16

I've got to get going, so here is the problem with step-by-step work. I hope it helps.\[\frac{7}{9}+\frac{1}{3}=\frac{7}{9}+\frac{1}{3}\frac{3}{3}=\frac{7}{9}+\frac{3}{9}=\frac{10}{9}=1\frac{1}{9}\]I'm not sure what level of math you are in; the improper fraction form is commonly used in some courses, while the mixed number form is used in others. I hope I was helpful. Keep working hard, you'll get this stuff.

Answer 17

Wrong answer!!!! I added instead of subtracted!!!! The correct problem is \[\frac{7}{9}-\frac{1}{3}=\frac{7}{9}-\frac{1}{3}\frac{3}{3}=\frac{7}{9}-\frac{3}{9}=\frac{4}{9}\]

Answer 18

Good luck with this.

Answer 19

Thank you so much