Step 1:
The first step to converting 10380.618778278 to a fraction is to re-write 10380.618778278 in the form p/q where p and q are both positive integers. To start with, 10380.618778278 can be written as simply 10380.618778278/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 10380.618778278, which in this case is 9. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 10380.618778278/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 10380.618778278/1 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 10380.618778278 as a fraction:
83045/8 / 1