Hailey paid $13 for 1 3/7 kg of sliced salami. What was the cost per kilogram of salami?

Let's convert 1 3/7 to an improper fraction, and 13 to an improper fraction.

Then multiply=

10/7 x 13/1

But wait! we are dividing so we need to flip "10/7"

7/10x13/1=91/10

Now we reduce that fraction down to 9 1/10

Then we convert that to dollars and cents.

Then we find that they paid $9.10 per kilogram