How many kilograms of potatoes are used to make 4 pounds french fries?

Here's how to figure that out:

* Conversion: There are approximately 2.2 pounds in 1 kilogram.

* Ratio: Potatoes lose some weight during the frying process, so you'll need a bit more than 4 pounds of potatoes to get 4 pounds of fries. A typical ratio is about 1.5:1 (meaning 1.5 pounds of potatoes yields 1 pound of fries).

Calculation:

1. Find the total potato weight: 4 pounds of fries * 1.5 = 6 pounds of potatoes

2. Convert to kilograms: 6 pounds / 2.2 pounds/kilogram = approximately 2.7 kilograms of potatoes.

Therefore, you'll need approximately 2.7 kilograms of potatoes to make 4 pounds of french fries.