Question

Annie loves giving away puppies. When her friend Bobby walks by, she instantly gives him 50% of her puppy stash. Bobby, stunned with this shower of puppies, gives back 20% of his total. Annie counters by giving Bobby 50% of her new puppy total. Bobby responds by giving Annie back 50% of the puppies he now has and then running off, having gone from 0 to 7 puppies in just a few seconds! How many puppies did Annie begin with?

Answer 1

Annie has 100% she then gives away 50%
-20% He gave back = 30% He still has
She gives 50 % Again 50%+30% = He now has 80%
He gives back 50%= 30% Again
He has 7 puppies at 30%
Annies Puppies = 70%
Total puppies = 100%

I believe that is right up to there just solve 10