Question

In LaToya’s school

3
8
of the students have a blood type of O+, and
1
12
of the students have a blood type of O–. What fraction of the students in LaToya’s school has a blood type of O+ or O–?

Answer 1

Answer:111/24

Explanation:

Answer 2

`(11)/(24)`

combine the fractions of each type by adding them

`(3)/(8)` +
`(1)/(12)`

Before we can add the fractions we require them to have the same denominator

To achieve this we require the lowest common multiple (LCM ) of 8 and 12

The LCM of 8 and 12 is 24

To change the denominators , multiply the numerator/ denominator by the appropriate value

`(3)/(8)` =
`(3(3))/(8(3))` =
`(9)/(24)`

`(1)/(12)` =
`(1(2))/(12(2))` =
`(2)/(24)`

Add the numerators leaving the denominator as it is

=
`(9+2)/(24)` =
`(11)/(24)`