In 2011, nearly percent of cohabiting couples lived with children under 18--either their own or those from a previous relationship or marriage.

Nearly 40%

Explanation:

Cohabitation is regarded as situation where by two persons or more come together with an agreement to leave without being married to one another. Their leaving together mostly leads to romantic or sexually intimate relationship. In 2011, research shows that cohabiting couples lived with children under 18 which may be their own or from other marriage.

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