Which of the following expressions equals 1/3 of 99?

To determine which expression equals one-third of 99, we first need to understand what it means to find one-third of a number. When we talk about finding one-third of any quantity, we are effectively dividing that quantity by 3.

When you take the expression 99 divided by 3, which is represented as 99/3, you are directly calculating one-third of 99. This operation will yield a result of 33, which is indeed one-third of 99.

On the other hand, 99/4 divides the number by 4, which does not reflect one-third and will result in a smaller value than expected. The expression 993 triples the value of 99, which is completely unrelated to finding one-third. Lastly, while the expression 991/3 does indeed yield the correct result by multiplying 99 by one-third, it is less straightforward and not as immediately recognizable as the division method demonstrated in 99/3.

Therefore, 99/3 stands out as the expression that clearly and directly equals one-third of 99.