Which of the following is a mixed number?

• A. 3 1/4
• B. 2/5
• C. 0.75
• D. 4/3

Answer: (A)

A mixed number is a number that combines a whole part with a fractional part, written with a space, and the fraction is proper (the numerator is smaller than the denominator). The form 3 1/4 has a whole part of 3 and a fractional part of 1/4, so it matches this idea. The other options aren’t mixed numbers as written: 2/5 is just a simple fraction, 0.75 is a decimal, and 4/3 is an improper fraction (it’s greater than 1) that would be written as a mixed number if you convert it, like 1 1/3, but not in mixed-number form here. So the mixed number here is 3 1/4.