Question
PSLE
Sabrina had a box of green marbles and red marbles in the ratio 13 : 7. She removed an equal number of green marbles and red marbles from the box. The ratio of the number of green marbles and red marbles left in the box became 8 : 3. What percentage of the marbles were left in the box?
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PSLE
Sabrina had a box of green marbles and red marbles in the ratio 13 : 7. She removed an equal number of green marbles and red marbles from the box. The ratio of the number of green marbles and red marbles left in the box became 8 : 3. What percentage of the marbles were left in the box?