Final answer:
A ratio can be used to show how much more income is available to pay interest. The ratio is calculated by dividing the income available to pay interest by the amount of interest to be paid.
Step-by-step explanation:
A ratio can be used to show how much more income is available to pay interest. The ratio is calculated by dividing the income available to pay interest by the amount of interest to be paid. For example, if the income available is $500 and the interest to be paid is $100, the ratio would be 500/100 = 5.