1/5 of the students at Kendall Middle School are in 6th grade. 3/7 of the students at Kendall Middle School are in 8th grade. What fraction of students are in 7th grade? Show your work.

13/35 because you have to find the common denominator which would be 35 and in order to get 7 to 35 you have to multiply the whole thing by 5 making the fraction equal 15/35 and you have to multiply the other fraction by 7 making it 7/35 add the two together which would equal 22/35 so to make that 35/35 it would have to be 13/35