Step 1:
The first step to converting 258200219.78102 to a fraction is to re-write 258200219.78102 in the form p/q where p and q are both positive integers. To start with, 258200219.78102 can be written as simply 258200219.78102/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 258200219.78102, which in this case is 5. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 258200219.78102/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 258200219.78102/1 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 258200219.78102 as a fraction:
258200219/1 / 1