"You like soup with chicken."
Translation:Du magst Suppe mit Hähnchen.
du = "singular" you. Used when addressing a single person. (du MAGST Suppe) ihr = "plural" you. Used when addressing more than one person. (Ihr mögt Suppe) If you are asked to translate from English to German without a context, either way is good.
Both forms are informal. If you are on a formal conversation you should use the "formal"you: Sie ( with a capitalized S), for either singular or plural.