Question

Mariana walked 3/10 mile to the park. Later, she walked 1/4 mile to a friend's house. Then she walked 2/5 mile home. How many miles did Mariana walk in all?​

Answer 1

19/20 of a mile.

Explanation:

`(3)/(10) + (1)/(4) + (2)/(5)`

The common denominator is 20 so we times the first one by 2 the second one by 5 and the last one by 4. (Both numerator and denominator.)

You will end up with this
`(6)/(20) + (5)/(20) + (8)/(20) = (19)/(20)`