Question

СРОЧНО НАДО! СРОЧНО! 20 БАЛЛОВ!

$\frac{8 \div 2 \frac{2}{5} }{5 \frac{1}{4} \div 7} \div \frac{2 \frac{1}{7} \times \frac{5}{7} }{4 \div \frac{8}{9} } =$
​

Answer 1

Ответ:

13 1/15

Пошаговое объяснение:

1) 8 : 2 2/5 = 8 : 12/5 = 8 * 5/12 = 10/3

2) 5 1/4 : 7 = 21/4 * 1/7 = 3/4

3) 10/3 : 3/4 = 10/3 * 4/3 = 40/9

4) 2 1/7 * 5/7 = 15/7 * 5/7 = 75/49

5) 4 : 8/9 = 4 * 9/8 = 9/2

6) 75/49 : 9/2 = 75/49 * 2/9 = 150/441

7) 40/9 : 150/441 = 40/9 * 441/150 = 196/15 = 13 1/15