Step 1:
The first step to converting 1563.898510931 to a fraction is to re-write 1563.898510931 in the form p/q where p and q are both positive integers. To start with, 1563.898510931 can be written as simply 1563.898510931/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 1563.898510931, which in this case is 9. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 1563.898510931/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 1563.898510931/1 each by 1000000000:
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 1563.898510931 as a fraction:
15639/10 / 1