Question

what is 7/10- 7/15?

Answer 1

When subtracting or adding fractions...you need to first find the LCD *Least common denominator*

so what number...is divisible by both 10 and 15?

Answer 2

5?

Answer 3

No you're thinking what goes into 10 and 15 evenly....but you need to find what number both 10 and 15 go into evenly

Answer 4

30?

Answer 5

Hint:
\[\frac{7}{10} \dot\ \frac{3}{3} - \frac{7}{15} \dot\ \frac{2}{2}\]

Answer 6

Sorry for the leave...yes 30 would be correct...so you then multiply the entire fraction

7/10 by 3...to get 10 to go to 30....so that would be

\[\frac{ 7 }{10 } \times \frac{ 3 }{ 3 } = \frac{ 21 }{ 30 }\]

And multiply that second fraction by 2 to get 15 to go to 30

\[\frac{ 7 }{15 } \times \frac{ 2 }{ 2 } = \frac{ 14 }{ 30 }\]

So now you have

\[\frac{ 21 }{ 30 } - \frac{ 14 }{ 30 }\]

When both fractions have a common denominator...you just simply write this as

\[\frac{ 21 - 14 }{ 30 }\]

So...what is 21 - 14?

Answer 7

i GOT THE ANSWER TO THAT QUESTION THANK YOU SO MUCH!!!!

Answer 8

No problem! :)