Question
PSLE
Emma had a box of purple marbles and blue marbles in the ratio 17 : 9. She removed an equal number of purple marbles and blue marbles from the box. The ratio of the number of purple marbles and blue marbles left in the box became 9 : 4. What percentage of the marbles were left in the box?
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PSLE
Emma had a box of purple marbles and blue marbles in the ratio 17 : 9. She removed an equal number of purple marbles and blue marbles from the box. The ratio of the number of purple marbles and blue marbles left in the box became 9 : 4. What percentage of the marbles were left in the box?