What is 12.75 as a fraction? Tutorial in mathshowcase.info

Converting decimals to fractions can be useful in many situations. Let's go through the steps to convert a decimal 12.75 to a fraction.

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

Often, convert 12.7 to a fraction or 12.8 to a fraction, depending on the task.

Understanding the decimal: “12.75”

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 12.75, 12 is the integer part and 75 is the fractional part.

Conversion Explanation:

For the numerator:
- We start with the number 12.75.
- By removing the decimal point, we derive the numerator as 1275.
For the denominator:
- Each position after the decimal represents a division by 10.
- Thus, having 2 positions after the decimal equates to 100 or 10².
Factors:
- The factors for the numerator and the denominator are numbers that can evenly divide each of them.
- For instance, the factors of 1275 include 1, 3, 5, 15, 17, 25, 51, 75, 85, 255, 425, and 1275.
- The factors of 100 comprise 1, 2, 4, 5, 10, 20, 25, 50, and 100.
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 1275 and 100 is 25.

The factors of 1275 are:

1 3 5 15 17 25 51 75 85 255 425 1275

The factors of 100 are:

1 2 4 5 10 20 25 50 100

Conversion formula (equation):

$12.75 = \frac{12.75}{1} = \frac{12.75 × 100}{1 × 100} = \frac{1275}{100} = \frac{1275÷25}{100÷25} = \frac{51}{4}$

Solution:

12.75 = $\frac{51}{4}$

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. 12.75 = $\frac{12.75}{1}$
Step 2: Decimals can have different lengths. We will align the number of digits after the decimal point. For 12.75, we have three digits. This means multiplying the fraction by a factor of 10 for each digit. Factor = 10² = 100
Step 3: Using this factor, multiply both the numerator and the denominator. $\frac{12.75 × 100}{1 × 100}$ = $\frac{1275}{100}$
Step 4: Now we need to simplify the fraction by finding common divisors. The greatest common divisor is 25. Divide both the numerator and the denominator by this common divisor. $\frac{1275 ÷ 25}{100 ÷ 25}$ = $\frac{51}{4}$

Answer in mixed fraction format:

12.75 =

12

3

4

What is 12.75 as a fraction?