Which is a better deal, buying a 12 pack Mountain Dew or one liter Mountain Dew. Well, a 12 pack cost 12.99 and a liter cost 5.39. To find the better deal you find the cost of one of the 12 pack cans ounces. Divide 12 by 12.99, which is a long number, so I round to the nearest hundredths. The amount per ounce is 0.92. Next divide one by 5.39, which also happens to be a long number, so I round to the nearest hundredths and got 0.19. As you can see buying the liter cost you less and is a better deal. 
     Some other options you can use this for is when buying meats, fruits, and sending a package. All these things you need to choose which is a better deal by the weight of cost.
However, sometimes it could be something else. Like sleeping in a hotel where sleeping over in 1 night cost  $50 sleeping over in three nights cost $175.
 
     A topic from last semester that reminds me most of math is arithmetic. It is a math problem that is mixed with lots of other lesson to solve it. A problem may have more than three lesson combined together. Such as this problem: /2-(-3)/+8. Firstly, the first step you do is the inside of what's in the absolute value sign, which was 2-(-3). If two negatives are together like this problem, change the two negatives to a positive or a plus. Now it is 2+3, which equals five. And the absolute value sign change it to a positive, but it is already positive, so 5 stays the same. Next is the simple step, you just add 5+8=13. After the problem we have already done three step to solve this problem. So as you can see, arithmetic has almost all the steps of math to solve it. 
     All the step that involves in the problem I have already learned, so it isn't really hard to solve the problem. Sometimes the problem could turn out to be real easy when you simplify it down.