Q. Of the 100 students in 7th grade , 4 out of every 10 students said that pizza was their favorite food. Based on this, how many students did NOT say pizza was their
favorite food?

You can begin by writing a ratio

4:10

To get the total students to 100, you must multiply 10 by 10. Therefore multiply 10x10 and 4x10

This gives a
40:100 ratio

That is how many said pizza is their favorite

To find how many did not, subtract 100-40 (total-part). This gives 60. That means 60 students didn’t say pizza is their favorite.

60

Hope this helps