Step 1:
The first step to converting 21377.815980834 to a fraction is to re-write 21377.815980834 in the form p/q where p and q are both positive integers. To start with, 21377.815980834 can be written as simply 21377.815980834/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 21377.815980834, which in this case is 9. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 21377.815980834/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 21377.815980834/1 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 21377.815980834 as a fraction:
106889/5 / 1