Convert your number into a regular fraction if it is a mixed number. A mixed number is a number that includes a whole number and a fraction. For example, if the mixed number is 2 1/2, convert it into the fraction 5/2.
Determine the value of your number. For example, if you paid 2 1/2 dollars for an 8-pound bag of apples, the value of your number is 8 pounds.
Divide the value of your number by the numerator, or top number, of the fraction to get the worth of the unit fraction. For example, divide 8 lbs (the value) by 5 (the numerator of 5/2 dollars), to get a result of 1.6 pounds for every 1/2 dollar (the unit fraction).