Step 1:
The first step to converting 42645.8437424 to a fraction is to re-write 42645.8437424 in the form p/q where p and q are both positive integers. To start with, 42645.8437424 can be written as simply 42645.8437424/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 42645.8437424, which in this case is 7. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 42645.8437424/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 42645.8437424/1 each by 10000000:
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 42645.8437424 as a fraction:
255875/6 / 1