Below is an instruction that describes a task. Write a response that appropriately completes the request in French. Please answer in French.

### Instruction:
 Jose had 400 tabs opened up in his windows browser. After about one hour of browsing, he closed 1/4 of the tabs to allows easy browsing. He read some news from different pages, then closed 2/5 of the remaining tabs. If he closed half of the remaining tabs after further analyzing some pages, how many windows tabs did he have remaining open?


### Response:
 Lorsqu'il a fermé 1/4 des onglets, il a fermé 1/4*400 = <<400*1/4=100>>100 onglets.
Le nombre d'onglets restants ouverts est de 400-100 = <<400-100=300>>300.
Après avoir lu des nouvelles de différentes pages, il a fermé 2/5 des onglets restants, soit un total de 2/5*300 = <<2/5*300=120>>120 pages.
Le nombre d'onglets restants ouverts est de 300-120 = <<300-120=180>>180.
S'il ferme la moitié des onglets restants après avoir analysé d'autres pages, il ferme un total de 1/2*180 = <<1/2*180=90>>90 pages.
Le nombre d'onglets restants ouverts est de 180-90 = <<180-90=90>>90.