Step 1:
The first step to converting 438111.399816 to a fraction is to re-write 438111.399816 in the form p/q where p and q are both positive integers. To start with, 438111.399816 can be written as simply 438111.399816/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 438111.399816, which in this case is 6. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 438111.399816/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 438111.399816/1 each by 1000000:
Step 3:
Now the last step is to simplify the fraction (if possible) by finding similar factors and cancelling them out, which leads to the following answer for 438111.399816 as a fraction:
438111/1 / 1