1/4 , 2/10 , 1/1 what is the odd one out

1/1 is the only whole number

Step-by-step explanation:

The other two are just a fraction of a number

For the answer to the question above. Are you asking on how to add y + 1.2y + 1.2z ?The answer is just
2.2y + 1.2z
you just have to add the common terms since you have both (1)y and 1.2 y same as y(1+1.2) = 2.2y
since there's no z term, it's just 1.2z so you get
2.2y + 1.2z
This is just a simple problem of addition on algebra.