To find percentages, you multiply the number by the percentage divide by 100.
Meaning, to find 30% of 100 you would divide 30 by 100 (getting .3) and then multiply 100 by it. It would be 100x.3 = 33. 33 is 30% of 100.
However, in this case, we know the percentage of kids but not the total. To find the total, we do the opposite of multiply (divide)
186÷.62 = 300
There are 300 students in Nate's class