Question

Find the sale pice is the original price is $82 and discount is 10%

Answer 1

First you should find the discount so you can say: 
10/100 = ?/82 
so ? is your discount and ? is equal to:
? = 82*10/100 = 8.2 
so your discount is $8.2 and your sale price will be:
$82 - $8.2 = $73.8 :)))
I hope this is helpful 
have a nice day