Step 1:
The first step to converting 1803121.8401642 to a fraction is to re-write 1803121.8401642 in the form p/q where p and q are both positive integers. To start with, 1803121.8401642 can be written as simply 1803121.8401642/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 1803121.8401642, which in this case is 7. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 1803121.8401642/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 1803121.8401642/1 each by 10000000:
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 1803121.8401642 as a fraction:
1803121/1 / 1