Question
PSLE
Emily had a box of black balls and silver balls in the ratio 17 : 8. She removed an equal number of black balls and silver balls from the box. The ratio of the number of black balls and silver balls left in the box became 9 : 1. What percentage of the balls were left in the box?
2 m

Click button first when a symbol is required. X

PSLE
Emily had a box of black balls and silver balls in the ratio 17 : 8. She removed an equal number of black balls and silver balls from the box. The ratio of the number of black balls and silver balls left in the box became 9 : 1. What percentage of the balls were left in the box?