Step 1:
The first step to converting 24890.399010423 to a fraction is to re-write 24890.399010423 in the form p/q where p and q are both positive integers. To start with, 24890.399010423 can be written as simply 24890.399010423/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 24890.399010423, which in this case is 9. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 24890.399010423/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 24890.399010423/1 each by 1000000000:
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 24890.399010423 as a fraction:
124452/5 / 1