What is one half plus four ninths

1

+

9



4



Since these fractions have different denominators, we need to find the least common multiple of the denominators

The least common multiple of 2 and 9 is 18, so we need to multiply to make each of the denominators = 18

2



1

∗

9



9

=

18



9



9



4

∗

2



2

=

18



8



Since these fractions have the same denominator, we can just add the numerators

18



9

+

18



8

=

18



17

17/18

Step-by-step explanation:

1/2 + 4/9

9/18 + 8/18 (need common denominators to add)

17/18

cannot simply because 17 is prime