tolong dijawab yang bisa..

pertama, perkalian dahulu.
2/6 x 1/3 = 2/18 = 2/2 = 1/9
3 1/3 - 1/9 = 3 9/27 - 3/27 = 3 6/27 + 7/18 = 3 108/486 + 189/486 = 3 297/486