hasil dari 2 5/7-2/3:2 5/6 adalah?..Tolong dijawab pakai cara.Terimakasih.

19/7 - 2/3 ÷ 17/6
19/7 - 2/3 × 6/17
19/7 - 12/51
2,70 - 4,25
- 1,55

2 5/7 = 19/7
2 5/6 = 17/6

= 19/7 - ( 2/3 : 5/6 )
= 19/7 - ( 2/3 • 6/5 )
= 19/7 - 12/15
= 285/105 - 84/105
= 201/105
= 1 96/105