Answer:
a)17/7
b)109/8
Explanation:
This means that in mixed fraction there is full number,numenetor and denomenetor.
Then to change it to improper fraction you only need to multiply the full number and the denomenetor and then add the numenetor in the sum.
a) 2 3/7 =2*7
=14 plus 3
=17/7
b)13 5/8 =13*8
=104 plus 5
=109/8
Good luck!