Question

2A:3B and 4B:5C then find A:C

Answer 1

A:B=3:2 and B:C =5:4
A/C=3*5/2*5=15/10
B:C=5*2/4*2=10/8
So, A:C =15:8

Answer 2

2A:3B = 1:1

2A/3B = 1/1
2A = 3B
B = 2A/3
4B = 8A/3

4B:5C = 1:1

4B = 5C
8A/3 = 5C
8A = 15C
A/C = 15/8

A:C = 15:8