Which of the following is the representation of a decimal number?                 a.  33/10      b.  1/2      c.  23      d.  .25

D

Step-by-step explanation:

A decimal number, is a number that isn't a whole number, and has decimal places after it. In this case, D. represents the number .25 which can also be written as 0.25, and that, is a decimal number.

Although fractions can be converted into decimal numbers (almost always, exept in some cases, called factors) just by solving them, in your question, they're in the fraction form, so they're not considered decimals.

Hope it helped,

BioTeacher101