Odpowiedź:
1/3 * 4/5 : 4 = 1/3 * 4/5 * 1/4 = 4/15 * 1/4 = 1/15
1 i 1/5 : 4/5 : 2/3 = 6/5 * 5/4 * 3/2 = 3/2 * 3/2 = 9/4 = 2 i 1/4
1 i 1/2 * 2/7 : 2 i 1/4 * 1/3 = 3/2 * 2/7 * 4/9 * 1/3 = 3/7 * 4/9 * 1/3 = 4/21 * 1/3 = 4/63
2/5 : 2 i 1/2 : 3/7 * 1 i 1/6 = 2/5 * 2/5 * 7/3 * 7/6 = 4/25 * 7/3 * 7/6 = 28/75 * 7/6 = 196/450 = 98/225