Step 1:
The first step to converting 157458.8564172 to a fraction is to re-write 157458.8564172 in the form p/q where p and q are both positive integers. To start with, 157458.8564172 can be written as simply 157458.8564172/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 157458.8564172, which in this case is 7. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 157458.8564172/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 157458.8564172/1 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 157458.8564172 as a fraction:
157459/1 / 1