Complex sentence: The languages spoken at home also vary from age; for example, approximately 68.2% of children who are 5--17 years old speak only English, while 16.9% of those children speak other Indo-European languages.
Split into simpler sentences: The languages spoken at home also vary from age, for example about 68.2% of children that are 5--17 years old speak only English. While only 16.9% of those children speak other Indo-European languages.