CODE EXAMPLE FOR RUBY

shopify: how to show percentage discount saved

    {% if template == 'product' %}
      {{ 'products.product.on_sale' | t }}
    {% else %}      
      {% assign percentage = 0 %}
      {% for variant in product.variants %}
      {% assign saving = variant.compare_at_price | minus: variant.price | times: 100 | divided_by: variant.compare_at_price | round %}
      {% assign percentage = saving | at_least: percentage %}
      {% endfor %} 


      Save up to {{ percentage }}%
    {% endif %}