There are 40 students in Joan’s class. She plans to invite them to her birthday party. She asked them to suggest a theme for her party. Three of every eight students suggested a rainbow theme party. How many students suggested a rainbow themed party?

Answer 1

Three out of every eight students suggested a rainbow theme party, so the total number of students who suggested a rainbow theme party is 3/8 x 40 = <<3/8*40=15>>15 students. Answer: \boxed{15}.