I have a simple question but am having a hard time understanding the explanation of an unreasonable answer. Any help would be helpful.

The question is, an auditorium holds 137 students but is only 60% full. How many students are in the auditorium? The answer is 82.2 obviously it is unreasonable to have 82.2 students. How can I make this reasonable. Thanks

just round
2 is less than 5 so it would be 82 students

To make the answer more reasonable, you can round down the decimal value. In this case, the answer is 82.2 students. Since you can't have a fraction of a student, you should round down to the nearest whole number.

To do this, you can look at the decimal value after the decimal point. In this case, the decimal value is 0.2. When rounding, if the decimal value is less than 0.5, you round down, and if it is 0.5 or greater, you round up.

Since 0.2 is less than 0.5, you should round down to the nearest whole number, which is 82. Therefore, the reasonable answer is 82 students in the auditorium.