How do I solve this one problem

0.M 0.N5

M and N represent digits in the two decimals listed above. One of the decimals is equivalent to 1/4 and the other is equivalent to 1/2. What is the sum of M and N?

Answers:
(A) 2
(B) 3
(C) 5
(D) 6
(E) 7

PLEASE, PLEASE explain this problem for me....it's on my practice PSAT worksheet.

Forgive me if I'm underthinking this, but it seems easy. 1/2 and 1/4 are equal to 0.5 and 0.25.

So the 0.M has 1 digit so we'll go say that is the 1/2. Therefore, M=5

That leaves N to equal the 0.25 and since N is the first digit, N=2.

2+5=7.

well, to make it equivalent you would divide 1/4 and divide 1/2; 1 divided by 4 is 0.25 So the answer for 0.N5 would be 0.25 so your answer would be (A) 2

then you would dived 1 by 2 which is 0.5. So the answer to 0.M would be (C) 5

So you would add 5 and 2. 5+2=7

N is 2 , as in 0.25 (1/4)

M is 5 , as in 0.5 (1/2)

So M+N = 7 . (E)say ;-)