Question

Subtract 55/21 from 131/7

Answer 1

`7(19)/(21)`

Explanation:

We want to subtract
`5(5)/(21)` from
`13(1)/(7)`.

In other words we want to perform the operation;

`13(1)/(7)-5(5)/(21)`

We change the mixed numbers to improper fraction

`(92)/(7)-(110)/(21)`

The least common denominator is 21.

We collect the least common denominator to obtain;

`(3*92-110)/(21)`

`(276-110)/(21)`

`(166)/(21)=7(19)/(21)`