If 62% of the students in a school are girls. what fraction of them are boys?

62% means 62 out of 100 students are girls, that means that 38% are boys then, or that 38 out of 100 are boys, how would that be in a fraction?

if you are saying purchasing 3 social media ads and one newspaper ad counts as one purchase then there are:

6 purchases

if you are asking how many of each then:

18 social media ads

6 newspaper ads