How to format AggregateRating correctly?

Question

HTML

Can it all be done like this?

<meta itemprop="worstRating" content="1"/>
<meta itemprop="ratingValue" content="4,8"/>
<meta itemprop="bestRating" content="5"/>
<meta itemprop="ratingCount" content="38914"/>

Without attachments and parent block?

<div itemprop="aggregateRating" itemscope itemtype="http://schema.org/AggregateRating">

Answer 1

Google Schema.org Markup Validator - https://search.google.com/structured-data/testing-tool