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 8 students suggested a rainbow-themed party. How many did not?

Answer 1

Three out of every 8 students suggested a rainbow-themed party, so the remaining students did not suggest a rainbow-themed party which is 8 - 3 = <<8-3=5>>5 students.
Since Joan has 40 students in her class, therefore those who did not suggest a rainbow-themed party is 5/8 * 40 = <<5/8*40=25>>25 students. Answer: \boxed{25}.

Answer 2

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-themed party. How many students suggested a rainbow-themed party? How many did not?(2 points) Suggested a rainbow-themed party Did not suggest a rainbow-themed party 5 15 20 25 15 20 25 35