What is 4.5 as a fraction?

4.5==

4.5 as a fraction is 9/2, or 4 1/2 as a mixed number in simplest form. As a percent it is 450%. On a tape measure that's the 4 1/2" mark.

Improper fraction 9/2Mixed number 4 1/2Percent 450%Before simplifying 45/10

How to convert 4.5 to a fraction

  1. There is 1 digit after the decimal point, so the last digit is in the tenths place. Write the digits over 10.
    4.5 = 45/10
  2. Simplify by dividing top and bottom by the GCF, 5.
    45/10 = 9/2
  3. As a mixed number:
    4 1/2

Fractions equal to 9/2

18/4 = 27/6 = 36/8 = 45/10 = 90/20 = 9/2. All are equivalent; 9/2 is the one in lowest terms.

Convert another value with the decimal to fraction converter, see neighbours in the fraction chart, or browse every decimal we list.

Questions people ask

What is 4.5 as a fraction?

4.5 as a fraction is 9/2 (4 1/2 as a mixed number). Written over 10 it is 45/10, which simplifies to 9/2.

What is 4.5 as a mixed number?

4 1/2. The whole number part is 4, and the decimal part .5 equals 1/2.

What is 4.5 as a percent?

4.5 × 100 = 450%.

What is 4.5 inches as a fraction?

4 1/2 inch, which is 114.300 mm.