What is 2.78238 as a fraction?

Numbers can be represented in a variety of ways including percentages, decimals, and fractions. The ability to convert any number from one format to another is an important math skill to have. These skills are typically thought in fifth grade math and require an understanding of place values and Greatest Common Factor (GCF).

In this article, we teach those skills step by step while demonstrating how to convert decimal 2.78238 into a fraction.

Answer: 2.78238 as a fraction equals 278238/100000 or 139119/50000

Here is the solution for converting 2.78238 to a fraction:

Step 1:

First, we write 2.78238 as  
2.78238/1

Step 2:

Next, we multiply both the numerator and denominator by 10 for each digit after the decimal point. Remember the numerator is the top part of the fraction and the denominator is the bottom part!
2.78238/1
  =  
2.78238 x 100000/1 x 100000
  =  
278238/100000


Step 3:

Next, we find the Greatest Common Factor (GCF) for 278238 and 100000. A factor is a number that divides into another number without any remainder.

The factors of 278238 are: 1  2  3  6  79  158  237  474  587  1174  1761  3522  46373  92746  139119  278238 
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 
So for 278238 and 100000 that gives us a GCF value of: 2

Step 4:

For the last step we reduce the fraction. This just means writing the fraction in the simplest way. To do this we divide both the numerator and denominator by the GCF value we determined in step 3.
278238/100000
  =  
278238 ÷ 2/100000 ÷ 2
  =  
139119/50000


Good work! We have just walked through the steps on how to represent 2.78238 as a fraction.

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