Method A: Compare at Price (Strikethrough)
- Go to Sales → Products → Select a product
- In the Sales tab, set:
- Sales Price: The discounted price (e.g., $8.00)
- Compare at Price: The original price (e.g., $10.00)
- Save
Result in shop: $10.00 $8.00
Method B: Pricelists (Percentage Discounts)
- Go to Sales → Products → Pricelists
- Click Create or edit existing pricelist
- Add a pricelist item:
- Applied On: Select products or categories
- Compute Price: Percentage discount
- Discount: Enter percentage (e.g., 20)
- Save
- Apply the pricelist in Website → Configuration → Settings