Gilda has a bag of marbles. She gives 20% of them to her friend Pedro. The, Gilda gives 10% of what is left to her other friend, Ebony. Finally, Gilda gives 25% of what is left in the bag to her brother. What percentage of her original bag does she have left?<spanclass=′latex−bold′>(A)</span>20<spanclass=′latex−bold′>(B)</span>3331<spanclass=′latex−bold′>(C)</span>38<spanclass=′latex−bold′>(D)</span>45<spanclass=′latex−bold′>(E)</span>54