Odpowiedź:
7/9 : 5/9 = 7/9 * 9/5 = 7/5 = 1 i 2/5
1 i 2/5 : 2 i 1/3 + 2 i 1/4 * 4/11 = 7/5 * 3/7 + 9/4 * 4/11 = 3/5 + 9/11 = 33/55 + 45/55 = 78/55 = 1 i 23/55
1 i 3/4 * (3 i 2/3 + 4 i 1/5 + 1 i 1/3) : 1 i 9/14 * 1/7 = 1 i 3/4 * (3 i 10/15 + 4 i 3/15 + 1 i 5/15) : 1 i 9/14 * 1/7 = 7/4 * 8 i 18/15 : 23/14 * 1/7 = 7/4 * 138/15 * 14/23 * 1/7 = 966/60 * 14/23 * 1/7 = 294/30 * 1/7 = 42/30 = 1 i 12/30 = 1 i 2/5