Final answer:
If 18 students who received an A in a math class constituted 30%, then the total number of students in the class would be 60.
Step-by-step explanation:
The question seems to be incomplete, but it suggests needing to calculate the percentage of students who received an A in a math class. Without the total number of students in the class, we cannot calculate the exact percentage. However, if we assume the question intended to say that 'the 18 students who received an A in a math class made up 30% of the class,' we can determine the total class size.
To find the total number of students in the class, we set up a proportion where 18 students is 30% (or 0.30) of the total class size (let's call it x). The equation would be 18 = 0.30x. By dividing both sides by 0.30, we get x = 18 / 0.30, and thus x = 60. Therefore, there were 60 students in the math class.