Answer:
129/2000
Step-by-step explanation:
To find the price per ounce, we take the cost and divide by the number of ounces
$1.29 /20
1.29/20
Since there is a decimal in the numerator, multiply the top and bottom by 100
1.29/20 * 100/100
129/2000
129 is prime so the fraction is simplified
