What is 1.21728 as a fraction?

Answer: 1.21728 as a fraction equals 121728/100000 or 3804/3125

Here is the solution for converting 1.21728 to a fraction:

Step 1:

First, we write 1.21728 as  

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!

1.21728/1

  =  

1.21728 x 100000/1 x 100000

  =  

121728/100000

Step 3:

Next, we find the Greatest Common Factor (GCF) for 121728 and 100000. A factor is a number that divides into another number without any remainder.

The factors of 121728 are: 1  2  3  4  6  8  12  16  24  32  48  64  96  128  192  317  384  634  951  1268  1902  2536  3804  5072  7608  10144  15216  20288  30432  40576  60864  121728 
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 121728 and 100000 that gives us a GCF value of: 32

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.

121728/100000

  =  

121728 ÷ 32/100000 ÷ 32

  =  

3804/3125

Good work! We have just walked through the steps on how to represent 1.21728 as a fraction.