6 2/3÷2 7/9 Спасибо заранее
6 2/3÷2 7/9 = 20/3 ÷ 25/9 = 20/3 × 9/25 = (20×9)/(3×25) = (4×3)/5 = 12/5 = 2 целых 2/5 = 2,4