Question
PSLE
Anna had a bag of white balls and yellow balls in the ratio 13 : 7. She removed an equal number of white balls and yellow balls from the bag. The ratio of the number of white balls and yellow balls left in the bag became 7 : 2. What percentage of the balls were left in the bag?
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PSLE
Anna had a bag of white balls and yellow balls in the ratio 13 : 7. She removed an equal number of white balls and yellow balls from the bag. The ratio of the number of white balls and yellow balls left in the bag became 7 : 2. What percentage of the balls were left in the bag?