Maths help

So I need some help with some fraction work for maths

How would work out the following?

2 + 1
- -
5 7 sorry about the weird layout of the fractions!

 

Get a common denominator, Do the same to top as you did bottom, and then just add.

 

Thankyou! Do you know how to x or divide them aswell?

 

is the question 2/5+1/7?

 

It would be:

(2x7)/(5x7)+(1x5/7x5)=
14/35+5/35=19/35

 

Thanks very much for the help

 

To multiply fractions do the numerator*numerator and denominator*denominator.
So: 1/3*1/2=(1*1)/(3*2)=1/6

To divide fractions, flip one of the fractions upside-down and then do the same process as multiplication.
So: 1/3 / 3/8 = 1/3*8/3 = (1*8)/(3*3) = 8/9

Hope this has helped

 

Times the bottom fractions then cross multiply, easiest way there is.