5/4 and 7/8
LCM=24 (as different denominators)
so, 20/24 and 21/24
= 20 * 5/24* 5 and 21 * 5/ 24 * 5
= 100/120 , 101/120 , 102/120 , 103/120 , 104/120 , 105/120
= (lowest term) therefore, 4 numbers between 5/6 and 7/8 are 101/120 , 17/20 , 103/120 , 26/30