This app introduces an independent global change in Odoo currency Decimal Precision. Decimal Places in amounts indicate sub units in the currency used. Most currencies have 2 decimal places, indicating that there are 100 sub-units (e.g. cents, pence etc) in a major unit. Some Middle Eastern currencies have 3 decimal places, indicating that there are 1000 sub-units in a major unit.
BHD Bahraini Dinar
IQD Iraqi Dinar
KWD Kuwaiti Dinar
Even when the DP is 3, rounding of subunits might be taking place in 2 positions.

The default system in Odoo adjusts Currency Decimal Places automatically, depending on the Currency Rounding Factor. For example, if rounding factor value is set for two places, the decimal places value also would be 2. Users can't manually set a different value for decimal places.

The currency related accuracy would work in all standard forms like sales order, invoice etc,

Here,
Subtotal = Quantity * Unit Price
= 24.669 * 30.77
= 759.06513
Rounding the value by 2 returns 759.07
Since decimal places value is 3, the figure displayed becomes 759.070