Step 1:
The first step to converting 684649.8 to a fraction is to re-write 684649.8 in the form p/q where p and q are both positive integers. To start with, 684649.8 can be written as simply 684649.8/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 684649.8, which in this case is 1. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 684649.8/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 684649.8/1 each by 10:
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 684649.8 as a fraction:
684650/1 / 1