Step 1:
The first step to converting 491912.6121 to a fraction is to re-write 491912.6121 in the form p/q where p and q are both positive integers. To start with, 491912.6121 can be written as simply 491912.6121/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 491912.6121, which in this case is 4. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 491912.6121/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 491912.6121/1 each by 10000:
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 491912.6121 as a fraction:
491913/1 / 1