Apair of jeans that originally costs $42 is 25% off. find the sale price. asap !

Original Price = $42
Discount = 25%   > 25% is discount because it says 25% off!!!
Now,
Sale price = original price - discount % of original price  
                 = 42 - 25% of 42 
                 = 42 - (25/100) * 42   
                 = 42 - 0.25 * 42 
                 = 42 - 10.5 
                 = 31.5

So, the sale price is $31.5