If cheese is $4.40 per kilogram, what should I pay for 200 grammes

The first step to solve this problem is to convert 200 grams to kilogram since the rate given to you is per kilogram.

1000 grams = 1 kilogram

200 grams = 0.2 kilogram

You have to multiply the equivalent kilogram to the rate per kilogram:

0.2 kilogram x $4.40 = $0.88