There are 24 sixth grafers and 40 seventh graders. mr. chan wants to divide both grades into groups of equal size, with the greatest possible nimber of students in each group, how many students should be in each group?

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers