Question
There were some erasers in Packet E and Packet F. After Ryan transferred 15 of the erasers from Packet E to Packet F, the ratio of the number of erasers in Packet E to that in Packet F changed to 3 : 8. Find the ratio of the numbers of erasers in Packet E to the number of erasers in Packet F at first.
3 m

Click button first when a symbol is required. X

There were some erasers in Packet E and Packet F. After Ryan transferred 15 of the erasers from Packet E to Packet F, the ratio of the number of erasers in Packet E to that in Packet F changed to 3 : 8. Find the ratio of the numbers of erasers in Packet E to the number of erasers in Packet F at first.