Step 1:
The first step to converting 11515780.918129 to a fraction is to re-write 11515780.918129 in the form p/q where p and q are both positive integers. To start with, 11515780.918129 can be written as simply 11515780.918129/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 11515780.918129, which in this case is 6. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 11515780.918129/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 11515780.918129/1 each by 1000000:
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 11515780.918129 as a fraction:
11515780/1 / 1