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Answer the following question:
  
A 0.24 g sample of a compound of oxygen and boron was found by analysis to contain 0.096 g of boron and 0.144 g of oxygen. Calculate the percentage composition of the compound by weight.
 
Boron and oxygen compound → Boron + Oxygen

0.24 g → 0.096 g + 0.144 g

Percentage composition of the compound.

For boron:
0.24 g → of boron
100 g → ?
100 x 0.096 / 0.24 = .

For oxygen:
0.24 g → of oxygen
100 g → ?
100 x 0.144 / 0.24 = .