Liam had 75% more magnets than John at first. Liam gave away 200% as many magnets as John. John was left with 25% of the magnets he had at first. What fraction of Liam's magnets did he have in the end?
Will say that John has 100 magnets. If John has 100 magnets, Liam will have 175. If Liam gave away twice as many magnets as John, and John has 25 magnets left, Liam gave away 150 magnets. Liam will end up with 25 magnets. And I think you can continue from there.