Colton surveyed his classmates. The ratio of students who prefer football to students who prefer baseball is 3:7. There are 30 students in Colton’s class. How many students prefer football? ratio of students who prefer football to students who prefer baseball is 3:7 therefore, ratio of students who prefer football to total students is 7:10 Set up a proportion: 7 prefer football x prefer football  =  {substituted given information into proportion} 10 total students 30 total students 10x = 7(30) {crossmultiplied} 10x = 210 {multiplied 7 by 30} x = 21 {divided each side by 10} 21 students prefer football  Algebra House
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