To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzes reviews to verify trustworthiness.
I am an adult learning Italian. I remembered how I learned to read English as a child and thought that applying my growing vocabulary to a children's book would help me. It absolutely has. :-) I love the English/Italian format, so I can read, attempt to translate, then check my understanding.