Sandra's dog gave birth to 7 puppies. Her vet gave her 105 portions of formula to give to the puppies for 5 days. How many times a day should Sandra feed the puppies? Give me reasons, before answering the question
Each day, Sandra will have 105 / 5 = 21 portions of formula. Each puppy needs to be fed 21 / 7 = 3 times a day. So the final answer is 3.