Answer :
Considering that their household expenses is of $120,000, the mortgage is 12% of their expenses.
The percentage of an amount a of an amount b is a multiplied by 100% and divided by b, that is:
[tex]P = \frac{a}{b} \times 100\%[/tex]
In this problem, the mortgage is of $14,400, while the total expenses are considered to be of $120,000, hence:
[tex]P = \frac{14400}{120000} \times 100\% = 12\%[/tex]
The mortgage is 12% of their expenses.
You can learn more about percentages at https://brainly.com/question/24729807