Question

What fraction of 4/7 when added to 4/7 gives 15/14

Answer 1

There is a slight error in this question. It should be what fraction, when added to 4/7 gives 15/14. I have taken this to arrive at the answer.

So, the answer can be obtained by subtracting 4/7 from 15/14. Subtracting 4/7 from 15/14 gives:

15/14 - 4/7.

LCM = 14.

15/14 - 4/7 = (15-8)/14 = 7/14 = 1/2.

Thus, the answer is 1/2.

Answer 2

The fraction required to add to 4/7 to get 15/14:

15/14 -4/7   =  (15-8)/14
 
                    = 1/2
Then you find what fraction of 4/7 1/2 is:

x(4/7)=1/2
therefore x= 1/2(7/4)

               = 7/8
Therefore the fraction of 4/7 required is 7/8