What is 0.81125 as a fraction?

In this article, we will guide you step by step through the process of converting the decimal 0.81125 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 0.81125 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.

0.81125 as a fraction equals 81125/100000 or 649/800

Now let's break down the steps for converting 0.81125 into a fraction.

Step 1:

First, we express 0.81125 as a fraction by placing it over 1:
0.81125/1

Step 2:

Next, we multiply both the numerator and denominator by 10 for each digit after the decimal point.
0.81125 x 100000/1 x 100000
  =  
81125/100000

Step 3:

Next, we find the Greatest Common Factor (GCF) for 81125 and 100000. Keep in mind a factor is just a number that divides into another number without any remainder.
The factors of 81125 are: 1 5 11 25 55 59 125 275 295 649 1375 1475 3245 7375 16225 81125
The factors of 100000 are: 1 2 4 5 8 10 16 20 25 32 40 50 80 100 125 160 200 250 400 500 625 800 1000 1250 2000 2500 3125 4000 5000 6250 10000 12500 20000 25000 50000 100000
The GCF of 81125 and 100000 is: 125

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 125 in this case.
81125 ÷ 125/100000 ÷ 125
  =  
649/800


Great Work! We've just determined that 0.81125 as a fraction equals 81125/100000 or 649/800 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 irrational numbers?

An irrational number is a number that cannot be expressed as a fraction of two integers. Examples include π (pi) and √2 (the square root of 2).

What is an exponent?

An exponent refers to the number of times a number (the base) is multiplied by itself. For example, 2³ means 2 × 2 × 2 = 8.

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 mean (average)?

The mean, or average, is calculated by adding all the numbers in a set and dividing by the total number of values. For example, the mean of 3, 4, and 5 is (3 + 4 + 5)/3 = 4.

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 decimal as a percentage?

A decimal can be converted to a percentage by multiplying it by 100 and adding a percent sign. For example, 0.75 × 100 = 75%.


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.

Build math skills with Brilliant.org interactive problem solving puzzles designed for adults. Algebra, geometry, logic, and probability are covered with video guides.

For personalized 1-1 lessons check out Preply.com.

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