How would you express 2400 watt-hours in kilowatt-hours?

To convert watt-hours to kilowatt-hours, you need to know the relationship between watts and kilowatts. One kilowatt is equal to 1000 watts. Therefore, to convert watt-hours to kilowatt-hours, you divide the number of watt-hours by 1000.

In this case, you have 2400 watt-hours. To convert it to kilowatt-hours, you perform the following calculation:

[

\text{Kilowatt-hours} = \frac{2400 \text{ watt-hours}}{1000} = 2.4 \text{ kWh}

]

This calculation shows that 2400 watt-hours is equivalent to 2.4 kilowatt-hours, making it the correct answer. This method of conversion applies universally when dealing with electrical energy measurements.