Solving Percent Problems Using Proportions

Up to 75% of college students wear eyeglasses or contacts. In 50 college students are wearing either glasses or contacts. About how many students are in the college?

Identify what you are solving for in this situation: 20% of students in class are wearing red. There are 30 students in the class. How many are wearing red?

Identify what you are solving for in this situation: 5 out of 10 cake slices have been eaten. What percent of the cake was eaten?

Identify what you are solving for in this situation: 300 students have pets that attend school. If 30% of all students have pets, how many students are there in the entire school?

A restaurant has a sign by the door that says "Maximum occupancy of 75 people." What percent of its capacity is 9 people?

A 20 ounce drink contains 80% fruit juice. How many ounces of fruit juice are in the drink?

60% of toys at a toy store require batteries. If there are 42 toys that require batteries, then how many toys are there altogether?