Step 1:
The first step to converting 215113836.77808 to a fraction is to re-write 215113836.77808 in the form p/q where p and q are both positive integers. To start with, 215113836.77808 can be written as simply 215113836.77808/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 215113836.77808, which in this case is 5. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 215113836.77808/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 215113836.77808/1 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 215113836.77808 as a fraction:
215113836/1 / 1