Step 1:
The first step to converting 6499.9406910672 to a fraction is to re-write 6499.9406910672 in the form p/q where p and q are both positive integers. To start with, 6499.9406910672 can be written as simply 6499.9406910672/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 6499.9406910672, which in this case is 10. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 6499.9406910672/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 6499.9406910672/1 each by 10000000000:
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 6499.9406910672 as a fraction:
103999/16 / 1