What is 2.5 as a fraction?

Converting decimals to fractions can be useful in many situations. Let's go through the steps to convert a decimal 2.5 to a fraction.

You can try other values to get more familiar with the conversion process.

Often, convert 2.48 to a fraction or 2.52 to a fraction, depending on the task.

Understanding the decimal: “2.5”

A decimal number consists of an integer part and a fractional part, separated by a decimal point. The integer part is on the left, and the fractional part is on the right. For example, in 2.5, 2 is the integer part and 5 is the fractional part.

Conversion Explanation:

  1. For the numerator:
    • We start with the number 2.5.
    • By removing the decimal point, we derive the numerator as 25.
  2. For the denominator:
    • Each position after the decimal represents a division by 10.
    • Thus, having 1 positions after the decimal equates to 10 or 101.
  3. Factors:
    • The factors for the numerator and the denominator are numbers that can evenly divide each of them.
    • For instance, the factors of 25 include 1, 5, and 25.
    • The factors of 10 comprise 1, 2, 5, and 10.
  4. Greatest Common Divisor (GCD):
    • It's the largest number that can evenly divide both the numerator and the denominator.
    • In this instance, the GCD for 25 and 10 is 5.

The factors of 25 are:

1 5 25

The factors of 10 are:

1 2 5 10

Conversion formula (equation):

2.5=2.51=2.5 × 101 × 10=2510=25÷510÷5=52


2.5 = 52

What is a decimal?

A decimal is a numeral system that includes a point to separate the whole number part from the fractional part. This system makes it easy to work with numbers less than one.

What is a fraction?

A fraction is a mathematical way of showing a part of a whole. It has two parts: the numerator on top and the denominator below, which help express partial values and comparisons.

Step-by-step solution:

  • Step 1: First, write the decimal as a fraction over 1. This sets up the next steps. 2.5 = 2.51
  • Step 2: Decimals can have different lengths. We will align the number of digits after the decimal point. For 2.5, we have three digits. This means multiplying the fraction by a factor of 10 for each digit. Factor = 101 = 10
  • Step 3: Using this factor, multiply both the numerator and the denominator. 2.5 × 101 × 10 = 2510
  • Step 4: Now we need to simplify the fraction by finding common divisors. The greatest common divisor is 5. Divide both the numerator and the denominator by this common divisor. 25 ÷ 510 ÷ 5 = 52

Answer in mixed fraction format:

2.5 =