Sarah is making her own costume for her role in the school play. The costume requires 2 and 5/8 yards of material. Select the number of yards needed for Sarah’s costume as an improper fraction.

2 5/8 = 16/8 + 5/8 = 21/8

To find the number of yards needed for Sarah's costume as an improper fraction, we need to convert the mixed number "2 and 5/8" into an improper fraction.

To do this, we first need to convert the whole number part, which is "2" into a fraction with the same denominator as "5/8". Since the denominator is already 8, we can write "2" as "2/1", so the fraction becomes "2/1".

Next, we need to find the sum of the fractions "2/1" and "5/8". To add fractions, we need to have a common denominator, which in this case is also 8. To make the denominators the same, we can multiply the numerator and denominator of "2/1" by 8, which gives us "16/8". Now we can add the fractions:

2/1 + 5/8 = 16/8 + 5/8 = 21/8

Therefore, Sarah needs 21/8 yards of material for her costume.