Question

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

Answer 1

in essence is just the another of saying, how many times does 1 and 3/7 go into $13? so is just a division, let's convert the mixed fraction to improper fraction first.

`\stackrel{mixed}{1(3)/(7)}\implies \cfrac{1\cdot 7+3}{7}\implies \stackrel{improper}{\cfrac{10}{7}} \\\\[-0.35em] ~\dotfill\\\\ 13/ \cfrac{10}{7}\implies \cfrac{13}{1}/ \cfrac{10}{7}\implies \cfrac{13}{1}\cdot \cfrac{7}{10}\implies \cfrac{91}{10}\implies 9.1 ~~ (\$)/(kg)`