Step 1:
The first step to converting 3143.990268878 to a fraction is to re-write 3143.990268878 in the form p/q where p and q are both positive integers. To start with, 3143.990268878 can be written as simply 3143.990268878/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 3143.990268878, which in this case is 9. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 3143.990268878/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 3143.990268878/1 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 3143.990268878 as a fraction:
320687/102 / 1