With total units 1000 and defects 24, what is the defect rate as a percentage?

With total units 1000 and defects 24, what is the defect rate as a percentage?

• A. 0.24%
• B. 2.4%
• C. 2.0%
• D. 3.0%

Answer: (B)

Defect rate is the proportion of defective units expressed as a percentage: defects divided by total units, then times 100. Here, 24 defects out of 1000 units gives 24/1000 = 0.024. Converting to a percent: 0.024 × 100% = 2.4%. So 2.4% of the units are defective. For reference, 2% would be 20 defects per 1000 and 3% would be 30 defects per 1000, so 24 fits right between those as 2.4%.

Defect rate is the proportion of defective units expressed as a percentage: defects divided by total units, then times 100. Here, 24 defects out of 1000 units gives 24/1000 = 0.024. Converting to a percent: 0.024 × 100% = 2.4%. So 2.4% of the units are defective. For reference, 2% would be 20 defects per 1000 and 3% would be 30 defects per 1000, so 24 fits right between those as 2.4%.