Step 1:
The first step to converting 7643.6212311786 to a fraction is to re-write 7643.6212311786 in the form p/q where p and q are both positive integers. To start with, 7643.6212311786 can be written as simply 7643.6212311786/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 7643.6212311786, which in this case is 10. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 7643.6212311786/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 7643.6212311786/1 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 7643.6212311786 as a fraction:
61149/8 / 1