In 1994, if twice as many autos imported to Country X broke down as au

This question is not hard mathematically. Linguistically, it's a beast.

Exported autos is a known value and a basis of comparison. Start there.

1. 20% of exported autos broke down

From the pie chart and legend on the right:
Total exported ITEMS = 100 million
Total imported AUTOS [solid black] = 10% of that number
.10 * (100 M) = 10 million autos were exported from X

20% of [those 10 million] exported autos broke down.
.20 * (10 million) = 2 million exported autos broke down

2. "[T]wice as many autos imported to Country X broke down as autos exported from Country X . . ."
Dense sentence.

Number of broken IMPORTED autos is twice the number of broken EXPORTED autos

Broken down autos EXPORTED from X, above, = 2 million
Broken down autos IMPORTED from X is twice that number:
(2 * 2 Million) = 4 million IMPORTED autos broke down

3. What percent of the imported autos broke down?

Total number of imported autos?
Total imports = 200 million
Autos [solid black] were 50% of total imports
So (.50) (200 m) = 100 million autos were imported

From above, 4 million of those [100 million] imported autos broke down

Percent of [100 million] imported autos that broke down [4 million broke down] =
\(\frac{4 m}{100 m} * 100 = .04 * 100\) = 4%

Answer D