Answer:
6 3/4 * 1/2 = gives us half of 6 3/4 so it is less than 6 3/4
6 3/4 * 5 = gives us 5 times 6 3/4 so it is more than 6 3/4
7/8 * 6 3/4 = gives us 7/8 of 6 3/4 so it is less than 6 3/4
6 3/4 * 1 2/9 = gives us 1 2/9 times 6 3/4 so it is more than 6 3/4