Step 1:
The first step to converting 420339895.874 to a fraction is to re-write 420339895.874 in the form p/q where p and q are both positive integers. To start with, 420339895.874 can be written as simply 420339895.874/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 420339895.874, which in this case is 3. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 420339895.874/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 420339895.874/1 each by 1000:
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 420339895.874 as a fraction:
420339895/1 / 1