Решите ( 13 1/7 + 5 2/3 ) : 5/7

Question

Решите ( 13 1/7 + 5 2/3 ) : 5/7

Answer 1

1)13 1/7+ 5 2/3 = 13 3/21+ 5 14/21= 18 17/21
2) 18 17/21 : 5/7 = 395/17 : 7/5 = 79/119