8/15
4 1/2*3/4 = 9/2*3/4 = 27/8 = 3 3/8
5/7*2 3/4 = 5/7*11/4 = 55/28 = 1 27/28
154/15 = 10 4/15
1 2/3*2 1/7 = 5/3*15/7 (możesz skrócić 3 z 15) = 25/7 = 3 4/7 jeśli skróciłxś
jeśli nie chcesz skracać albo nie wiesz jak to:
1 2/3*2 1/7 = 5/3*15/7 = 75/21 = 25/7 = 3 4/7
3 1/4*1 2/5 = 13/4*7/5 = 91/20 = 4 11/20
