symfony: Serializer Component - decimal with scale not working

Symfony version(s) affected: 4.2.3 (and 4)

Description
The scale of the attribut is not working when the view return the data.

How to reproduce
Set a decimal attribut in the entity example

 /**
     * @ORM\Column(type="decimal", precision=6, scale=2)
     * @Groups({"contract", "contracts", "contract_lite"})
     */
    private $quantity;

in the controller, return the view of the group, example : @Rest\View(serializerGroups={"contract_lite"}

So I POST the value “3.86” in quantity, if I dump the object I have “3.86” but it return me “3.859999999999999875655021241982467472553253173828125”

Possible Solution
Add the possibility to change the type or specify the scale?