The correct option is D 34
We know that, fractions are a part of whole.
Part of cup filled + part of cup not filled = 1 (Whole part of the cup is 1)
Given, part of cup filled with water = 1 quarter
Four quarters represent one whole.
Remaining part of the cup which is not filled by water
= Whole part of the cup - part of the cup filled with water
= 4 quarters - 1 quarter
= 3 quarters
Hence, the part of the cup that still needs to be filled is three - quarters
= 34.30038