dividing rational equations (ANSWER NEEDED ASAP)

Question

3x^3/7y^5 divided by 18x/21y^3

Answer 1

 3*x^3           21*y^3

--------- * --------------- <----  dividing fractions, KFC: keep, flip, change

 7 y^5           18x

 

 

x^2               3

-----   *    -----------  <------------- 18 cancels 3 by factor of 6; x^3/x = x^2;  21 cancels 7 by factor of 3; y^3/y^5=1/y^2

 y^2             6

 

 x^2/(2y^2)  <---- 3/6 = 1/2