This Instructional Activity is a part of the Lesson 16, Unit 4, Grade 7. Individually, students will read and make sense of the word problem. Class will reconvene to work out the problem together. A school has 60% girls and 40% boys. If 20% of the girls wear glasses and 40% of the boys wear glasses, what percent of all students wears glasses? Consider offering premade tape diagrams for students.