Final answer:
None of the given fractions (1/2, 3/4, 5/6, 7/10) are equivalent to 7/8 yard of ribbon that Tracy bought.
Step-by-step explanation:
The student asked which other fraction could represent the amount of ribbon that Tracy bought if she purchased 7/8 yard. To find an equivalent fraction to 7/8, we should compare it to the given options of 1/2, 3/4, 5/6, and 7/10. We need a fraction that has the same value as 7/8 when simplified or converted. Clearly, 1/2, which is equivalent to 4/8, and 7/10, which is less than 7/8 as 10 is a larger denominator than 8, are not correct. When comparing 3/4 (which is 6/8 when having a common denominator with 7/8) and 5/6 (which is more than 8/8 when simplified), neither match 7/8. Therefore, none of the given options accurately represent 7/8 of a yard of ribbon.