割引率、二十パーセント引きでいいかな？

N2 割引 waribiki discount N3 率 ritsu rate, ratio, percentage N5 二 ni two, number two N5 十 juu ten N3 パーセント paasento percent N5 いい ii good, nice, okay

N3 割 katsu / wa.ru, wari, wa.ri, wa.reru, sa.ku proportion, comparatively, divide N3 引 in / hi.ku, hi.keru pull, tug, jerk N1 率 sotsu, ritsu, shutsu / hiki.iru ratio, rate, proportion N5 二 ni, ji / futa, futa.tsu, futatabi two, two radical (no. 7), deux N5 十 juu, jitsu, jutsu / too, to, so ten, dix, diez

N5 〜で de Indicates where an action happens, means used, tool, cause, or material depending on context N5 〜か ka Marks a question, alternative, or uncertainty, appears at the sentence end or between options