Question
PSLE
Jade had a bag of gold marbles and black marbles in the ratio 13 : 7. She removed an equal number of gold marbles and black marbles from the bag. The ratio of the number of gold marbles and black marbles left in the bag became 3 : 1. What percentage of the marbles were left in the bag?
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PSLE
Jade had a bag of gold marbles and black marbles in the ratio 13 : 7. She removed an equal number of gold marbles and black marbles from the bag. The ratio of the number of gold marbles and black marbles left in the bag became 3 : 1. What percentage of the marbles were left in the bag?