Question
PSLE
Fanny had a box of purple marbles and yellow marbles in the ratio 13 : 7. She removed an equal number of purple marbles and yellow marbles from the box. The ratio of the number of purple marbles and yellow marbles left in the box became 4 : 1. What percentage of the marbles were left in the box?
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PSLE
Fanny had a box of purple marbles and yellow marbles in the ratio 13 : 7. She removed an equal number of purple marbles and yellow marbles from the box. The ratio of the number of purple marbles and yellow marbles left in the box became 4 : 1. What percentage of the marbles were left in the box?