in a sample of college students , 20 percent are third year students and 80 percent are not second - year students . what fraction of those students who are not third - year students are second - year students ?
"= 20 / 80 . = 1 / 4 my answer is a too"
divide(subtract(subtract(const_100, 20), multiply(const_3, const_10)), multiply(const_3, const_10))