Organize the information given.
*The park is square; each side is 7/10 of a mile. So, the perimeter of the park is: (7/10)(4) → (7/5)(2) → 14/5
*She walked around the park 3 1/2 times. So, she walked 14/5 miles by 3 1/2 times.
Just multiply the fractions together to get the product.
= 14/5 × 3 1/2
= 14/5 × 7/2
Reduce the number by 2.
= 7/5 × 7/1
Multiply regularly.
= 49/5
Change into a mixed fraction.
= 9 4/5 is the solution.