Step 1:
The first step to converting 8921.421791207 to a fraction is to re-write 8921.421791207 in the form p/q where p and q are both positive integers. To start with, 8921.421791207 can be written as simply 8921.421791207/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 8921.421791207, which in this case is 9. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 8921.421791207/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 8921.421791207/1 each by 1000000000:
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 8921.421791207 as a fraction:
62450/7 / 1