5 5/8 yards of fabric
1) Considering that the whole project consists of shirt and jacket
2 3/8 + 3 1/4
2) Let's convert those mixed numbers into improper fractions
Now we can add them:
3) Finally, let's turn back to mixed number, dividing 45 by 8:
So, the amount of fabric needed is 5 5/8 for that project