What is 2.125 as a fraction?

Converting decimals to fractions can be useful in many situations. Let's go through the steps to convert a decimal 2.125 to a fraction.

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

Often, convert 2.12 to a fraction or 2.13 to a fraction, depending on the task.

Understanding the decimal: “2.125”

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 2.125, 2 is the integer part and 125 is the fractional part.

Conversion Explanation:

  1. For the numerator:
    • We start with the number 2.125.
    • By removing the decimal point, we derive the numerator as 2125.
  2. For the denominator:
    • Each position after the decimal represents a division by 10.
    • Thus, having 3 positions after the decimal equates to 1000 or 103.
  3. Factors:
    • The factors for the numerator and the denominator are numbers that can evenly divide each of them.
    • For instance, the factors of 2125 include 1, 5, 17, 25, 85, 125, 425, and 2125.
    • The factors of 1000 comprise 1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500, and 1000.
  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 2125 and 1000 is 125.

The factors of 2125 are:

1 5 17 25 85 125 425 2125

The factors of 1000 are:

1 2 4 5 8 10 20 25 40 50 100 125 200 250 500 1000

Conversion formula (equation):

2.125=2.1251=2.125 × 10001 × 1000=21251000=2125÷1251000÷125=178

Solution:

2.125 = 178

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. 2.125 = 2.1251
  • Step 2: Decimals can have different lengths. We will align the number of digits after the decimal point. For 2.125, we have three digits. This means multiplying the fraction by a factor of 10 for each digit. Factor = 103 = 1000
  • Step 3: Using this factor, multiply both the numerator and the denominator. 2.125 × 10001 × 1000 = 21251000
  • Step 4: Now we need to simplify the fraction by finding common divisors. The greatest common divisor is 125. Divide both the numerator and the denominator by this common divisor. 2125 ÷ 1251000 ÷ 125 = 178

Answer in mixed fraction format:

2.125 =
2
1
8