Write the ratio as a fraction in simplest form.

1.29$ for 20 ounces (per ounce)

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