Step 1:
The first step to converting 159618.78729562 to a fraction is to re-write 159618.78729562 in the form p/q where p and q are both positive integers. To start with, 159618.78729562 can be written as simply 159618.78729562/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 159618.78729562, which in this case is 8. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 159618.78729562/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 159618.78729562/1 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 159618.78729562 as a fraction:
638475/4 / 1