3/4-5/16=0,4375

3/10-1/5=0,1

2/3-5/9=0,(1)

1/2-1/4=0,25

3/7-5/14=0,07142857142

2/5-1/20=0,35

1. =7/16

2. =1/10

3. =1/9

4. =1/4

5. =1/14

6. = 5/20 = 1/4