HESI Math Practice Exam

To convert pounds to kilograms, you can use the conversion factor that 1 pound is approximately equal to 0.453592 kilograms. To find the value of 2.2 pounds in kilograms, multiply 2.2 by this conversion factor:

\[ 2.2 \, \text{pounds} \times 0.453592 \, \text{kg/pound} \approx 1.0006 \, \text{kg} \]

When rounding to one decimal place, this value is approximately 1.0 kg. The closest option to this rounded value is 1 kg, making it the most accurate choice based on the conversion. Therefore, while it seems that 0.9 kg might be suggested as a rough estimate without detailed calculation, it does not reflect the correct conversion when rounded accurately. The conversion shows that 1 kg is indeed the nearest approximation for 2.2 pounds in kilograms.