500
In Mr. Jones’s grade 8 class 20 students, or 5/7 of the class, bought class photos. In Ms. Floyd’s grade 8 class 18 students, or 2/3 of the class, bought class photos. How many students were there in total in Mr. Jones’s and
Ms. Floyd’s classes?
20 ÷ 5/7 + 18 ÷ 2/3 = 28 +27 = 55