I have some math questions:

Reform the indicated operation. write in lowest terms.

#8. 2 2/5 times 1 6/7?

#10. 2 2/5 divide 6?

#12. 1 1/6+4 3/5?

#14. 50 1/4-32 2/3?

#20. what is the least common denominator for 3/4 and 2/7?

Does any one know these? it would be greatly appreciated. thank you.