Step 1:
The first step to converting 216435690.4808 to a fraction is to re-write 216435690.4808 in the form p/q where p and q are both positive integers. To start with, 216435690.4808 can be written as simply 216435690.4808/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 216435690.4808, which in this case is 4. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 216435690.4808/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 216435690.4808/1 each by 10000:
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 216435690.4808 as a fraction:
216435690/1 / 1