Aviolin originally costs $700, but it is on sale for 15% off. if a customer buying the violin has a gift card for $60.00, what will his final price be on the violin after using the gift card? \

700 * .15 = 105
700 - 105 = 595
595 - 60 = $535

The first thing to do is figure out the price after the discount. 
If it's on sale for 15% off, you take 700*.15 which gives you 105. You then subtract 105 from 700 and this gives you the sale price of $595.

The next thing to do is subtract the amount on the gift card from the price of the violin. To do this you take 595-60 which gives you $535. 

And there you have it! After accounting for the 15% off and the $60 gift card, the violin will cost the customer $535. 

You would add 1/3 + 1/3. Since both the fractions have the same denomotar, you just add the numerators to get 2/3. Make sure NOT to add the denomotar.