Step 1:
The first step to converting 153251691.21871 to a fraction is to re-write 153251691.21871 in the form p/q where p and q are both positive integers. To start with, 153251691.21871 can be written as simply 153251691.21871/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 153251691.21871, which in this case is 5. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 153251691.21871/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 153251691.21871/1 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 153251691.21871 as a fraction:
153251691/1 / 1