To convert pounds (lbs) to kilograms (kg), you can use the following step-by-step process:

Step 1: Understand the conversion factor

1 pound (lb) is equal to 0.45359237 kilograms (kg). This is the conversion factor we will use to convert pounds to kilograms.

Step 2: Set up the conversion equation

To convert pounds to kilograms, we can use the equation:

Weight in kg = Weight in lbs × Conversion factor

Step 3: Plug in the given weight in pounds

In this case, the given weight is 42 lbs. So, we can substitute this value into the equation:

Weight in kg = 42 lbs × Conversion factor

Step 4: Calculate the conversion

Multiply the weight in pounds by the conversion factor to get the weight in kilograms:

Weight in kg = 42 lbs × 0.45359237 kg/lb

Step 5: Perform the calculation

Using a calculator, multiply 42 by 0.45359237:

Weight in kg ≈ 19.051 kg

Therefore, 42 lbs is approximately equal to 19.051 kg.