Respuesta :

21\9 is simplest or you could do 2 wholes and 3\9 because 2 wholes is 9 can be counted 2 times in the #21 so then there is 3 leftover so left would be 3\9 so you would have 2 wholes and 3\9 but simpler would be 21\9.
hope this helps!!
3/7 is the correct answer