Americans spend about 16 percent of their income on food. families in less developed countries typically spend of their total income on food.

The correct answer is - approximately 50%.

Even though we can roughly put lot of countries in the least developed countries list, still there are differences from country to country. The expenditure on food, from the total available income, in the least developed countries accounts for roughly 50% on average. Now the average can be misleading, as most of the people in the least developed countries spend in the range of the 40% to 46% percents, but there are some where over 80% is spent on food, like Zimbabwe for example, which increases the total average.

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