Step 1:
The first step to converting 450424831.21987 to a fraction is to re-write 450424831.21987 in the form p/q where p and q are both positive integers. To start with, 450424831.21987 can be written as simply 450424831.21987/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 450424831.21987, which in this case is 5. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 450424831.21987/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 450424831.21987/1 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 450424831.21987 as a fraction:
450424831/1 / 1