(7 5/12-3 1/6)*2 2/17=

(7 5/12-3 1/6)* 2 2/17=9
1)7 5/12 - 3 1/6= 89/12- 19/6 *2=89/12- 38/12=51/12
2)51/12 * 2 2/17= 51/12* 36/17=9