Question

My recipe calls for 2/3 cups of white flour and 2 1/5 cups of whole wheat flour. How much flour do I need in total?

Answer 1

`2/3+2(1/5)=16/15`

Explanation:

`2/3+2(1/5)=?`

The closest common denominator is 15

`(2*5)/(3*5)+2((1*3)/(5*3))=(10)/(15)+(3*2)/(15)=(10+6)/(15)=16/15`

Can we simplify it?
`16/15=(2*2*2*2)/(5*3)`

They don't have anything in common. so no.