Step 1:
The first step to converting 1845.9889378352 to a fraction is to re-write 1845.9889378352 in the form p/q where p and q are both positive integers. To start with, 1845.9889378352 can be written as simply 1845.9889378352/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 1845.9889378352, which in this case is 10. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 1845.9889378352/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 1845.9889378352/1 each by 10000000000:
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 1845.9889378352 as a fraction:
166139/90 / 1