Step 1:
The first step to converting 651664.12880445 to a fraction is to re-write 651664.12880445 in the form p/q where p and q are both positive integers. To start with, 651664.12880445 can be written as simply 651664.12880445/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 651664.12880445, which in this case is 8. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 651664.12880445/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 651664.12880445/1 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 651664.12880445 as a fraction:
651664/1 / 1