select sum(dco.prix_unitaire * dco.quantite) as Montant,
sum(dco.prix_unitaire * dco.quantite) / (select sum(prix_unitaire * quantite)
										from details_commandes) *100 as pourcentage
from details_commandes dco
inner join commandes co ON dco.no_commande = co.no_commande
inner join clients cl ON co.code_client = cl.code_client
where cl.pays = 'Brésil';