Step 1:
The first step to converting 21412890.843215 to a fraction is to re-write 21412890.843215 in the form p/q where p and q are both positive integers. To start with, 21412890.843215 can be written as simply 21412890.843215/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 21412890.843215, which in this case is 6. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 21412890.843215/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 21412890.843215/1 each by 1000000:
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 21412890.843215 as a fraction:
21412890/1 / 1