Fraction Subtraction (Unlike Denominators, No Mixed Numbers)

Find the difference. Simplify all answers completely. Change improper fractions to mixed numbers. 

1. $\dfrac{7}{27}-\dfrac{2}{9}$=

2. $\dfrac{15}{24}-\dfrac{3}{6}$=

3. $\dfrac{19}{22}-\dfrac{1}{11}$=

4. $\dfrac{3}{4}-\dfrac{2}{14}$=

5. $\dfrac{2}{9}-\dfrac{11}{54}$=

6. $\dfrac{6}{8}-\dfrac{4}{32}$=

7. $\dfrac{15}{26}-\dfrac{1}{6}$=

8. $\dfrac{19}{28}-\dfrac{4}{56}$=

9. $\dfrac{17}{98}-\dfrac{3}{49}$=

10. $\dfrac{9}{45}-\dfrac{1}{30}$=

11. $\dfrac{9}{21}-\dfrac{3}{14}$=

12. $\dfrac{7}{31}-\dfrac{13}{62}$=