[12 - {1 / 8 + 3 / 16}] / / 9 / 4

[12 - {1 / 8 + 3 / 16}] / / 9 / 4

=[12-(1/8+3/16)]*4/9
=[12-5/16]*4/9
=12*4/9-5/16*4/9
=16/3-5/36
=5 and 7 / 36

3 / 4 / 5 2 / 5 3 / 10 7 / 9 3 / 5

135/180
144/180
72/180
54/180
140/180
108/180

Divide 3 out of 4, 5 out of 7, and 7 out of 9, and arrange them in the order from small to large
One more question!
Is there a minimum score with denominator 12 and less than 5 / 6? If so, please write it

3 out of 4, 5 out of 7, and 7 out of 9 are divided in the order from small to large
The general denominator is 4 * 7 * 9 = 252
189 of 252, 180 of 252, 196 of 252
In the second question, 5 out of 6 is equal to 10 out of 12. Therefore, 9 out of 12, 8, 7, 6, 5, 4, 3, 2 and 1 are smaller than 5 out of 6. Among them, the simplest scores are 7 out of 12, 5 out of 12 and 1 out of 12