Step 1:
The first step to converting 553955357.78928 to a fraction is to re-write 553955357.78928 in the form p/q where p and q are both positive integers. To start with, 553955357.78928 can be written as simply 553955357.78928/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 553955357.78928, which in this case is 5. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 553955357.78928/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 553955357.78928/1 each by 100000:
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 553955357.78928 as a fraction:
553955357/1 / 1