Step 1:
The first step to converting 161715.78157938 to a fraction is to re-write 161715.78157938 in the form p/q where p and q are both positive integers. To start with, 161715.78157938 can be written as simply 161715.78157938/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 161715.78157938, which in this case is 8. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 161715.78157938/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 161715.78157938/1 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 161715.78157938 as a fraction:
646863/4 / 1