Answer:

Explanation:
size 10 dress requires 2 1/4 yards of fabric while a jacket requires 1 5/8 yards so we add them
2 1/4+1 5/8
we make similar fractions and turn the denominator to 8
2 2/8+ 1 5/8
and now we can add the whole numbers first
2+1=3
now the fractions
2/8+5/8
7/8
final answer is 2 7/8
hopes this helps