Question

Coat that usually cost $123 is marked 1/3 off what is the sale price of the coat

Answer 1

1/3 of 123 is 41

123 - 41 = 82

The sale price of the coat is $82

And that answers your question!

Answer 2

A whole is 3/3.

now, the coat has been discounted by 1/3, that means the new price is 2/3 of the regular price.

now, if the regular price is $123, how much is 2/3 of 123?  well is just the product,

$\bf 123\cdot \cfrac{2}{3}\implies \cfrac{246}{3}\implies 82$