4.5 as a Fraction

9/2

How to convert 4.5 to a fraction

4.5 as a fraction in simplest form is 9/2.

  1. Count the decimal places

    4.5 has 1 decimal place. The denominator is 10^1 = 10.

  2. Remove the decimal point

    Move the digits after the decimal into the numerator: 45/10.

  3. Find the greatest common divisor (GCD)

    GCD(45, 10) = 5.

  4. Divide by the GCD to simplify

    45 ÷ 5 = 9 and 10 ÷ 5 = 2, so the simplified fraction is 9/2.

  5. Express as a mixed number

    9 ÷ 2 = 4 with remainder 1, written as 4 1/2.