The statement '1 in 5 adults experience mental illness' implies what percentage?

The statement '1 in 5 adults experience mental illness' implies what percentage?

• A. 20% of Adults
• B. 50% of Adults
• C. 5% of Adults
• D. 80% of Adults

Answer: (A)

The idea being tested is how to convert a phrase like "one in five" into a percentage. One in five means one part out of five equal parts, which is the fraction 1/5. To turn that into a percent, multiply by 100: 1/5 × 100 = 20%. So it represents 20% of adults who experience mental illness. The other percentages correspond to different fractions: 50% is one-half, 5% is one-twentieth, and 80% is four-fifths.

The idea being tested is how to convert a phrase like "one in five" into a percentage. One in five means one part out of five equal parts, which is the fraction 1/5. To turn that into a percent, multiply by 100: 1/5 × 100 = 20%. So it represents 20% of adults who experience mental illness.

The other percentages correspond to different fractions: 50% is one-half, 5% is one-twentieth, and 80% is four-fifths.