Question

If Geo had 3/8 of a pizza and his sister had 7/9 of another pizza, how much pizza do they have in all?

Answer 1

[see below]

Explanation:

Geo has 3/8 of a pizza. His sister has 7/9 of another pizza.

Add the values:

`(3)/(8)+(7)/(9)\\\\ \text{The LCM of the denominators is 72.}\\\\(3*9)/(8*9)=(27)/(72)\\\\(7*8)/(8*9)=(56)/(72)\\\\(27+56)/(72)=(83)/(72)\\\\(83)/(72)=1(11)/(72)\\\\\boxed{(3)/(8)+(7)/(9) = 1(11)/(72)}`