Question

What is 2/4 + 4/5 - 7/10 ? Please help

Answer 1

Make sure they have all common denominators

`(2)/(4) + (4)/(5) - (7)/(10)`


`(2)/(4) * (5)/(5) = (10)/(20)`


`(4)/(5) * (4)/(4) = (16)/(20)`


`(7)/(10) * (2)/(2) = (14)/(20)`


`(10)/(20) + (16)/(20) - (14)/(20)`

Add
`(10)/(20) + (16)/(20) = (26)/(20)`

`(26)/(20) - (14)/(20) = (12)/(20)`

To simplify, you must find the largest common factor which 4
In
`(12)/(20)`
12÷4=3 and 20÷4=5

The answer is
`(3)/(5)`