Question

Shelly ran 21/4 miles. Lynne ran 31/8 miles. Who ran farther and by how much? A. Lynne by 7/8 miles B. Lynne by 3/4 miles C. Shelly by 3/4 miles D. Shelly by 7/8 miles

Answer 1

Shelly by 7/8 miles

Explanation:

The question was copy-pasted wrong.
It was supposed to be:

Shelly ran 2 1/4 miles. Lynne ran 3 1/8 miles. Who ran farther and by how much?

A. Lynne by 3/4 miles

B. Lynne by 7/8 miles

C. Shelly by 3/4 miles

D. Shelly by 7/8 miles

Answer 2

Please, check the values of the problem

Answer. Shelly by 11/8 miles

Solution

Shelly ran 21/4 miles

Lynne ran 31/8 miles

To compare the two fractions we must have the same denominator. Multiplying the miles that shelly ran by 2/2:

Shelly: (21/4) * (2/2)=(21*2) / (4*2)=42/8 miles

Now we can compare:

42/8 miles (Shelly) > 31/8 miles (Lynne), then Shelly ran farther.

By how much?:

42/8-31/8=(42-31)/8=11/8 miles