What is 2.55 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 2.55 to a fraction.

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

Often, convert 2.54 to a fraction or 2.56 to a fraction, depending on the task.

Understanding the decimal: “2.55”

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 2.55, 2 is the integer part and 55 is the fractional part.

Conversion Explanation:

For the numerator:
- We start with the number 2.55.
- By removing the decimal point, we derive the numerator as 255.
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 255 include 1, 3, 5, 15, 17, 51, 85, and 255.
- 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 255 and 100 is 5.

The factors of 255 are:

1 3 5 15 17 51 85 255

The factors of 100 are:

1 2 4 5 10 20 25 50 100

Conversion formula (equation):

$2.55 = \frac{2.55}{1} = \frac{2.55 × 100}{1 × 100} = \frac{255}{100} = \frac{255÷5}{100÷5} = \frac{51}{20}$

Solution:

2.55 = $\frac{51}{20}$

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. 2.55 = $\frac{2.55}{1}$
Step 2: Decimals can have different lengths. We will align the number of digits after the decimal point. For 2.55, 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. $\frac{2.55 × 100}{1 × 100}$ = $\frac{255}{100}$
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. $\frac{255 ÷ 5}{100 ÷ 5}$ = $\frac{51}{20}$

Answer in mixed fraction format:

2.55 =

2

11

20

What is 2.55 as a fraction?