Step 1:
The first step to converting 31.2 to a fraction is to re-write 31.2 in the form p/q where p and q both are positive integers. To start with, 31.2 can be written as simply 31.2/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 31.2, which in this case is 1. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 31.2/1 each by 10 to the power of that many digits. For instance, for 0.45, there are 2 fractional digits so we would multiply by 100; or for 0.324, since there are 3 fractional digits, we would multiply by 1000. So, in this case, we will multiply the numerator and denominator of 31.2/1 each by 10:
Step 3:
Now the last step is to simplify the fraction (if possible) by finding similar factors and cancelling them out:
