Passage Summary: As people in this country get older, they eat more grams of fat, but the percentage of their diet that consists of fat doesn't change.

Reasoning: Adults in Country X consume more total fat as they age, yet the ratio of fat to their total dietary intake remains constant.

Analysis: This stimulus presents a mathematical relationship that requires a logical synthesis. If the total amount of fat (the numerator) is increasing, but the percentage of fat relative to the total diet (the fraction) remains the same, the total amount of food or calories consumed (the denominator) must also be increasing. Look for an answer that concludes that adults in Country X consume more total food or calories as they get older. This is a classic LSAT 'number versus percentage' setup.