There are 56 students that make 70 percent of the class. How many students in all?

don't know if this is a 'test', or you actually want to know! anyway, here is the answer and how you come to it.

You have 70% of the class (as 56 students)- to get 70% up to the 100%, you need to divide 100 by 70 (because 70multiplied bythat amount = 100). This comes to approx 1.42857142857. multiply that by 56 on your calculator and that comes to a lovely 80 students