Answer: 9/14
Explanation:
As Eric ran 5/7 of the distance ran on Friday, you have to times 5/7 by the distance ran on Friday.
So we have:
5/7 x 9/10 = 9/14
This is calculated by multiplying the numerators (numbers on top) and the denominators (numbers on the bottom)
Numerators:
5x9 = 45
Denominators:
7x10 = 70
So we now have the new fraction: 45/70, if we simplify this, we get:
45/70 = 9/14
(dividing the top and bottom both by 5)
Hope that makes sense! If you'd like any more help with maths, I'd be happy to offer online tuition. You can find me at: www.birchwoodtutors.com