Its a fraction question that is giving me trouble

Question

in a year, a family member earned $24, 000.00 and another earned $24, 000.00. The total annual income for the family was $56,000.00. The extra earning came from investments. What is the fraction that came from this investment?

Answer 1

The family earned $24,000 + $24,000 , which is $48,000.

 

As a fraction, the family earned 48k out of the total 56k (48k/56k) which is 6/7ths.

 

 

So, if the family earned 6/7th's how much came from the investment? (This is your answer)