hi . how u r doing good. pls help me with these questions , I really need help
A) Divide the difference of 2/15, -16/20 by their product.

B) The product of two rational numbers is -3/7. If one of the number is 5/21, find the
other

C) Compute 9/5x -2/27+7/30

D) 5/7 – 2/3| + |3/14 – 5/7

Thank you :)