what proportion 15 is 5?
I wrote 3:1 but I think that is ratio.
I am not sure we did not do any algebraic equations in class we only started this topic on Thursday so we only had 1 lesson of it and we looked at basics.
So let me give you an exampleto give you a chance to find it out by your own in turn.
Say the proportion of 25 and 5 has to be find out, it would be: 5x = 25 => x = 5. In ratio it is 5:1. Got it?