3 4/17 *2 13/19 - 3 4/17 *1 13/19 =? Помогите плиз =)

Question

3 4/17 *2 13/19 - 3 4/17 *1 13/19 =?
Помогите плиз =)

Answer 1

3_4/17 *2_13/19 - 3_4/17 *1_13/19 =
= 55/17 * 51/19 - 55 / 17 * 32/19 = 55/17 ( 51/19-32/19 = 55/17 * 19/19 = 55/17 = 3_4/17

Answer 2

1)3 4/17*2 13/19=55/17*51/19=165/19
2)3 4/17*1 13/19=55/17*32/19=1760/323
3)165/19-1760/323=2805/323-1760/323=1045/323=3 76/323