Final answer:
Louise's debt payments-to-income ratio is approximately 15.97%.
Step-by-step explanation:
To calculate Louise's debt payments-to-income ratio, we need to find the total amount of her debt payments and divide it by her monthly gross income.
First, let's calculate the total debt payments. Louise's monthly credit payments for VISA and MasterCard are $175 and $195, respectively, and her monthly payment for an automobile loan is $285. Therefore, her total debt payments are $175 + $195 + $285 = $655.
Next, let's calculate Louise's debt payments-to-income ratio. Her monthly gross income is $4,100, so her debt payments-to-income ratio can be calculated as ($655 / $4,100) x 100% = 15.97% (rounded to two decimal places). Therefore, Louise's debt payments-to-income ratio is approximately 15.97%.