With this information, you can calculate the quantity of ounces 21 pounds is equal to.
¿What is the inverse calculation between 1 ounce and 21 pounds?
Performing the inverse calculation of the relationship between units, we obtain that 1 ounce is 0.0029761905 times 21 pounds.
Which is the same to say that 21 pounds is 336 ounces.
Twenty-one pounds equals to three hundred thirty-six ounces. *Approximation
A ounce is zero times twenty-one pounds. *Approximation