If a country's debt-to-GDP ratio is currently 5 and its debt is expected to grow from 20 billion dollars to 40 billion dollars in the next 25 years what will the country's GDP have to be in 25 years t?

If the debt-to-GDP ratio is 5, it means that the country's debt is five times its GDP. If the debt is expected to grow to 40 billion dollars in 25 years, then the GDP must be 40 billion dollars divided by 5, which equals 8 billion dollars. Therefore, the country's GDP will need to be 8 billion dollars in 25 years to maintain the same debt-to-GDP ratio.