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

Click button first when a symbol is required. X

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