5/7×2/3 + 14/15÷1/9= 5/7×2/3 + 14/15×9= 10/21 + 42/5= 50/105 + 884/105= 934/1057/5×3/2 + 14/15÷1/9= 7/5×3/2 + 14/15×9= 21/10 + 42/5= 21/10 + 84/10= 105/10= 21/2