ブラウザの設定でJava Scriptの使用を有効にしてご利用ください。
出典:Wiktionary
"How d'you" /ˈhaʊdju/ becomes /ˈhaʊdʒə/ ("howja") by yod-coalescence (whereby /j/ assimilates to /ʒ/) and reduction of the unstressed /u/ (which becomes /ə/).
howja