Skróć ułamki: 8/12, 10/20, 24/40, 50/75, 14/35, 6/12, -8/20, 6/4, 20/15, -28/56, 2/10, 3/33, 14/7, -8/26, 18/36, 100/60, -21/49, 150/650, 1125/6450, 60000/900000.