Step 1:
The first step to converting 90109980.787136 to a fraction is to re-write 90109980.787136 in the form p/q where p and q are both positive integers. To start with, 90109980.787136 can be written as simply 90109980.787136/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 90109980.787136, which in this case is 6. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 90109980.787136/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 90109980.787136/1 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 90109980.787136 as a fraction:
90109980/1 / 1