Question

3 9/14 : (1 3/7 - 5/21 × 0,9) ( помоите плиз)

Answer 1

5/21*9/10=5*9/21*10=
3/7*2=3/14
1 3/7-3/14=1 6/14-3/14
=1 3/14
3 9/14:1 3/14=
51/14:17/14=51/14*14/17=3

Answer 2

Большое спасибо!