Step 1:
The first step to converting 378016.80421215 to a fraction is to re-write 378016.80421215 in the form p/q where p and q are both positive integers. To start with, 378016.80421215 can be written as simply 378016.80421215/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 378016.80421215, which in this case is 8. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 378016.80421215/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 378016.80421215/1 each by 100000000:
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 378016.80421215 as a fraction:
378017/1 / 1