Jin wants to make a scarf and matching hat for his sister. The patterns call for 7/8 yard of fabric for the scarf 1/2 yard of fabric for the hat. How much fabric should Jin buy?

7/8 + 1/2 = ?

Find the common denominator

A multiple of 2 is 8 which is the lowest common multiple of the two denominators

You multiply the denominator by four to get 8 so you also multiply the numerator by four

1/2 = 4/8

Then add the numerators and the denominator stays the same

7/8 + 4/8 = 11/8