Well, there are an infinite number of fractions between 2/3 and 3/4. But here's one way to find three different fractions - put the fractions over larger common denominators until the difference between their numerators is 4 or more:
2/3 = 8/12 = 16/24 = 32/48
3/4 = 9/12 = 18/24 = 36/48
So three different fractions between 2/3 and 3/4 are 33/48, 34/48, 35/48
1/2 = 2/4 = 4/8 = 8/16
3/4 = 6/8 = 12/16
So three different fractions between 1/2 and 3/4 are 9/16, 10/16 (=5/8), 11/16

Arthur D.
08/28/14