Question
PSLE
Rachel had a box of grey marbles and brown marbles in the ratio 13 : 7. She removed an equal number of grey marbles and brown marbles from the box. The ratio of the number of grey marbles and brown marbles left in the box became 5 : 1. What percentage of the marbles were left in the box?
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PSLE
Rachel had a box of grey marbles and brown marbles in the ratio 13 : 7. She removed an equal number of grey marbles and brown marbles from the box. The ratio of the number of grey marbles and brown marbles left in the box became 5 : 1. What percentage of the marbles were left in the box?