What is 10.5 as a fraction?

In this article, we will guide you step by step through the process of converting the decimal 10.5 into a fraction. We will start by understanding how a decimal represents the fractional part of a number, then break down the steps to rewrite 10.5 as a fraction. Finally, we will simplify the fraction by identifying and applying the Greatest Common Factor, ensuring the results are in the simplest form.

By the end of this guide, you should have a good understanding of decimal to fraction conversions and be able to apply this knowledge to various mathematical problems. Let's begin.

10.5 as a fraction equals 105/10 or 21/2

Now let's break down the steps for converting 10.5 into a fraction.

Step 1:

First, we express 10.5 as a fraction by placing it over 1:
10.5/1

Step 2:

Next, we multiply both the numerator and denominator by 10 for each digit after the decimal point.
10.5 x 10/1 x 10
  =  
105/10

Step 3:

Next, we find the Greatest Common Factor (GCF) for 105 and 10. Keep in mind a factor is just a number that divides into another number without any remainder.
The factors of 105 are: 1 3 5 7 15 21 35 105
The factors of 10 are: 1 2 5 10
The GCF of 105 and 10 is: 5

Step 4:

To simplify the fraction, we divide both the numerator and denominator by their greatest common factor (GCF), which we calculated in the previous step. The GCF value is 5 in this case.
105 ÷ 5/10 ÷ 5
  =  
21/2


Great Work! We've just determined that 10.5 as a fraction equals 105/10 or 21/2 in its simplest form.

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Frequently asked math questions, including decimals and fractions

Read the following section to help deepen your understanding of basic math concepts.

What are improper fractions?

Improper fractions are fractions where the numerator (the top number) is greater than or equal to the denominator (the bottom number). Example 3/2

Why is there a need to convert decimals to fractions anyway?

The U.S. is one of a few countries worldwide that still uses the Imperial system of measurement, which is a fractional measurement system, where items are measured in feet, inches, pounds, ounces, yards, and so on. The majority of the rest of the world uses the metric system, which is a decimal measurement system, where items are measured in cm, meters, grams, kilos, and so on.

What is a square root?

The square root of a number is a value when multiplied by itself, gives that number. For example, the square root of 9 is 3 because 3 × 3 = 9.

What is a proportion?

A proportion is an equation that states that two ratios are equal. For example, 1/2 = 2/4 shows a proportional relationship.

What is a percentage as a fraction?

A percentage can be written as a fraction by placing it over 100 and simplifying. For example, 20% = 20/100 = 1/5.

What is a fraction bar?

A fraction bar is the horizontal line that separates the numerator and denominator in a fraction. It also represents division. For example, in 2/4, the fraction bar means 2 divided by 4.


Educational math links

There are numerous online resources available (some free and some paid) for learning math including decimals and fractions. These range from interactive games to in-depth courses and lessons. We recommend these websites as a valuable resource for students of all skill levels.

Math Is Fun covers math topics including decimals, fractions, data, money, algebra, and calculus. Courses are designed for students from Kindergarten to Grade 12.

For a UK based curriculum the BBC.co.uk provides a useful classroom aid to math lessons.

Cliff Notes is tailored for independent study for the SAT, ACT, GMAT, GRE, and AP exams. It's a free service.



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