Please help with this chemistry question!?

A High School student suspected that the vinegar in the cafeteria was diluted. A 10.0 ml sample of vinegar was titrated to an endpoint with 1.00 x 10-2 M KOH from a buret. The volume of base added to reach the endpoint was 25.4 ml. Find the concentration of the acetic acid in the vinegar. If normal vinegar is about 1.0M ethanoic acid, was the vinegar diluted?