At a school pep rally the ratio of students who wore red to those who wore yellow is 7 to 3 their are 300 students at the rally each wore either red or yellow how many more students wore red?

Red to yellow ... 7:3 ... added = 10

so 7/10 of the total students wore red and 3/10 of the total students wore yellow

and there are 300 total students ...

7/10 (300) = 2100/10 = 210 wore red

3/10 (300) = 900/10 = 90 wore yellow

how many more wore red ... (210 - 90) = 120 more students wore red then yellow