Question
PSLE
Esther had a basket of blue marbles and red marbles in the ratio 13 : 7. She removed an equal number of blue marbles and red marbles from the basket. The ratio of the number of blue marbles and red marbles left in the basket became 6 : 1. What percentage of the marbles were left in the basket?
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PSLE
Esther had a basket of blue marbles and red marbles in the ratio 13 : 7. She removed an equal number of blue marbles and red marbles from the basket. The ratio of the number of blue marbles and red marbles left in the basket became 6 : 1. What percentage of the marbles were left in the basket?