I'm having trouble understanding how to approach this problem. Can anyone please explain how it's done? I understand that it's relating to the law of multiple proportion

Two different compounds, each containing only phosphorus and chlorine, were decomposed into their constituent elements. One produced 0.2912 g P for every gram of Cl; the other produced 0.1747 g P for every gram of Cl. Show that these results are consistent with the law of multiple proportions.

Question

I'm having trouble understanding how to approach this problem. Can anyone please explain how it's done? I understand that it's relating to the law of multiple proportion 

Two different compounds, each containing only phosphorus and chlorine, were decomposed into their constituent elements. One produced 0.2912 g P for every gram of Cl; the other produced 0.1747 g P for every gram of Cl. Show that these results are consistent with the law of multiple proportions.

anonymous · Answer

Law which states that when elements combine, they do so in the ratio of small whole numbers (assuming they have the same type of chemical bonds).

anonymous · Answer

The problem is that I don't understand how to approach or solve it.