First, turn 70% into a decimal by dividing 70 by 100.
70% ⇒ 0.70
Multiply 120 by 0.70.
120 × 0.70 = 84
Now we know that 84 students are involved in extracurricular activities. Subtract 84 from 120 to find the amount of students who are not involved in extracurricular activities.
120 - 84 = 36
Answer:
36 seventh grade students are not involved in extracurricular activities.
