Step 1:
The first step to converting 3870800.7909978 to a fraction is to re-write 3870800.7909978 in the form p/q where p and q are both positive integers. To start with, 3870800.7909978 can be written as simply 3870800.7909978/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 3870800.7909978, which in this case is 7. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 3870800.7909978/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 3870800.7909978/1 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 3870800.7909978 as a fraction:
3870800/1 / 1