Question

A and B share the cost in a ratio of 3:2 A pays 125£ how much does b pay???

Answer 1

Let the common multiple be x 
3x : 2x 
3x = 125 
x = 125/3 

So, B pays 2x = 2 × 125/3 = £250/3 

Answer 2

3:2
3+2=5
125 divided by 5
=15