Step 1:
The first step to converting 213123.29541888 to a fraction is to re-write 213123.29541888 in the form p/q where p and q are both positive integers. To start with, 213123.29541888 can be written as simply 213123.29541888/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 213123.29541888, which in this case is 8. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 213123.29541888/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 213123.29541888/1 each by 100000000:
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 213123.29541888 as a fraction:
639370/3 / 1