Question
There were some marbles in Bag Q and Bag R. After Fabian transferred 15 of the marbles from Bag Q to Bag R, the ratio of the number of marbles in Bag Q to that in Bag R changed to 1 : 8. Find the ratio of the numbers of marbles in Bag R to the number of marbles in Bag Q at first.
3 m

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There were some marbles in Bag Q and Bag R. After Fabian transferred 15 of the marbles from Bag Q to Bag R, the ratio of the number of marbles in Bag Q to that in Bag R changed to 1 : 8. Find the ratio of the numbers of marbles in Bag R to the number of marbles in Bag Q at first.