Question 1/10 of the current U.S. population has diabetes. 2/5 of the people with diabetes have not been diagnosed with the disease. What fraction of the U.S. population has undiagnosed diabetes? Write the answer in simplest form.

To find the fraction of the U.S. population with undiagnosed diabetes, we need to calculate (2/5) * (1/10) which is equal to (2/5) * (1/10) = 2/50 = 1/25.

Therefore, 1/25 of the U.S. population has undiagnosed diabetes.