In addition to the two debt ratios described in this chapter, the World Bank recommends the use of four additional debt ratios in assessing a country’s risk: the ratio of total external debt to GNP, the ratio of total external debt to exports, the debt-service ratio (accrued debt service to exports), and the interest-service ratio (accrued interest service to exports).

In 1998, Mexico had \($380\) billion in gross national product (GNP), \($160\) billion in total external debt, \($140\) billion in exports, and \($29\) billion in accrued debt service, and \($13\) billion in accrued interest service. Calculate the above four debt ratios for Mexico.