Step 1:
The first step to converting 676639.21428744 to a fraction is to re-write 676639.21428744 in the form p/q where p and q are both positive integers. To start with, 676639.21428744 can be written as simply 676639.21428744/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 676639.21428744, which in this case is 8. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 676639.21428744/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 676639.21428744/1 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 676639.21428744 as a fraction:
676639/1 / 1