UpStudy Free Solution:

To convert pounds to kilograms, use the conversion factor \(1 \space \text { kg} \approx 2.2 \space \text { pounds} \).

Given:

\[1 \space \text { kg} \approx 2.2 \space \text { pounds} \]

To convert 153 pounds to kilograms:

\[\text { weight in kg} = \frac { \text { weight in pounds} } { 2.2} \]

So:

\[\text { weight in kg} = \frac { 153} { 2.2} \approx 69.545\]

Rounding to the nearest tenth:

\[\text { weight in kg} \approx 69.5\]

Thus, 153 pounds is approximately \(69.5\) kilograms.

Supplemental Knowledge

Understanding unit conversion is essential for various applications in science, engineering, and everyday life. Converting between different units of measurement allows for consistent communication and accurate calculations.

Key Concepts:

1. Conversion Factor: A ratio that expresses how many of one unit are equal to another unit. For converting pounds to kilograms, the conversion factor is \(1 \space \text { kg} \approx 2.2 \space \text { pounds} \).

2. Steps for Conversion:

- Identify the conversion factor: \(1 \space \text { kg} = 2.2 \space \text { pounds} \).

- Set up the conversion equation: To convert pounds to kilograms, divide the number of pounds by 2.2.

- Perform the calculation: For example, converting 153 pounds to kilograms:

\[\text { weight in kg} = \frac { 153} { 2.2} = 69.545\]

- Round as needed: Rounding to the nearest tenth gives approximately \(69.5\) kg.

Additional Example:

- Converting 220 pounds to kilograms:

\[\text { weight in kg} = \frac { 220} { 2.2} = 100\]

Thus, 220 pounds is exactly \(100\) kilograms.

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