How to Change Sale badge for percentage on different variants - Dawn Theme

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I am trying to change sale badge for percentage off 

But it is comparing the price with highest amount on variant and lowest price so i am getting 96% off which is wrong

  {%- if show_badges -%}
    <span class="badge price__badge-sale color-{{ settings.sale_badge_color_scheme }}">
      {{ product.compare_at_price_max | minus: product.price | times: 100.0 | divided_by: product.compare_at_price_max | money_without_currency | times: 100 | remove: '.0'}}% OFF
    </span>