Помоги а (9-2 2/3*2 1/7)*21/46

Question

Помоги а (9-2 2/3*2 1/7)*21/46

Answer 1

2 ( 2/3 ) * 2 ( 1/7 ) = 8/3 * 15/7 = 40/7 = 5 ( 5/7 ) 
9 - 5 ( 5/7 ) = 8 ( 7/7 ) - 5 ( 5/7 ) = 3 ( 2/7 ) = 23/7 
23/7 * 21/46 = 3/2 = 1,5