What does it mean if the quotient times the divisor does not equal the dividend? what should you do?

Which of the following answers is 7/9 simplified? 7/9 2/9 11/9 2/7

What is the result of converting 60 ounces to pounds remember there are 16 ounces in a pound

1- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis.2- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in the first question?