Step 1:
The first step to converting 199270.4478453 to a fraction is to re-write 199270.4478453 in the form p/q where p and q are both positive integers. To start with, 199270.4478453 can be written as simply 199270.4478453/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 199270.4478453, which in this case is 7. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 199270.4478453/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 199270.4478453/1 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 199270.4478453 as a fraction:
398541/2 / 1