Question

A:B=5:9 AND B:C=4:7 THEN A:B:C IS

Answer 1

A:B
B:C
=
5:9
4:7
=
20:36
36:63
So, A:B:C=20:36:63

Answer 2

A:B = 5:9 AND B:C = 4:7

B Is common term in both

A:B = 20:36 and B:C = 36:63

then A:B:C = 20:36:63