The atomic proportions and atomic ratio

Find the atomic proportions and atomic ratio for the elements found in an example mineral given the following weight per cent abundance and find the elemental composition and atomic ratio. Find the mineral: Si (wt%= 19.53,Atomic weight= 28,atomic proportion=0.695) Mg(wt%= 34.95,Atomic weight= 24,,atomic proportion=1.44) O(wt%= 45.51,Atomic weight= 16,atomic proportion=2.84) What is the Atomic ratio of the element?