Of the students in ms. danver's class, 6 walk to school. this represents 30% of her students. how many students are in ms. damver's class?

There is 20 students. To find the answer you need to use porportionals and cross multiply.

The total amount of students in Ms. Damver's class is 20. This includes the 6 that walk to class (representative  of 30%) and the 14 others (representative of 70%).

Subtracting is the opposite of adding