Go to Settings > General Settings, scroll down to the bottom of the page and Activate the developer mode. Then go to Settings > Technical > Database Structure > Decimal Accuracy and update the required setting.

Dear Paresh Wagh

I tried this way Settings > General Settings, scroll down to the bottom of the page and Activate the developer mode. Then go to Settings > Technical > Database Structure > Decimal Accuracy, but found that i cant Change from 3 to 2, only accepting if i want increase the decimal accuracy.

Can you provide another way if possible, thanks for your support 

Where Odoo Stores Decimal Precision

Odoo uses the model: decimal.precision (or in recent versions, decimal.accuracy or just via res.config.settings depending on the field).

For example:

• Product Unit of Measure → Product Unit of Measure Precision
• Accounting (Price, Amounts) → Account precision
• Currency Rounding → Decimal Places on currency

🔧 Step-by-Step: Change Decimal Precision (back to 2 digits)

✅ Option 1: Update Decimal Precision in UI

1. Activate Developer Mode
   • Go to Settings → Activate the Developer Mode (⚙️ icon > "Activate Developer Mode")
2. Go to Technical → Decimal Accuracy
   • Navigate to Settings > Technical > Database Structure > Decimal Accuracy
   • Look for entries like:
     • Product Unit of Measure
     • Account
     • Product Price
     • etc.
3. Edit the relevant entries
   • Change from 3 to 2
   • Save

✅ That’s it! All relevant views and calculations will now show 2 digits instead of 3.