Step 1:
The first step to converting 66790.478645152 to a fraction is to re-write 66790.478645152 in the form p/q where p and q are both positive integers. To start with, 66790.478645152 can be written as simply 66790.478645152/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 66790.478645152, which in this case is 9. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 66790.478645152/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 66790.478645152/1 each by 1000000000:
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 66790.478645152 as a fraction:
133581/2 / 1