$${a over b}={2 over3}$$ and $${b over c}={4 over5}$$ then the ratio $${a+b} over {b+c}$$ equal to:

$${a over b}={2 over3}$$ and $${b over c}={4 over5}$$ then the ratio

1.	$${a over b}={2 over3}$$ and $${b over c}={4 over5}$$ then the ratio $${a+b} over {b+c}$$ equal to:
A.	$${20 over27} $$
B.	$${27 over20} $$
C.	$${6 over8} $$
D.	$${8 over6} $$
Answer» B. $${27 over20} $$