Discount, tax, and tip word problems

The topic  appears under the 7th Grade Math Mission. This exercise works word problems that include the concepts of markups and markdowns.

Types of Problems
There are two types of problems in this exercise:


 * 1) Marking up an amount: This problem provides a situation where an amount is being marked up by some percentage. The student is asked to find either the total or the amount of the mark up.Dtatwp1.png
 * 2) Marking down an amount: This problem provides a situation where an amount is being marked down by some percentage. The student is asked to find either the amount of mark down or the final amount.Dtatwp2.png

Strategies
Knowledge of using percentage in word problem is sufficient for being able to perform this exercise.
 * 1) The mark up problems can ask for the amount of tax, the price with tax, the amount of mark up, or the price with mark up.
 * 2) The mark down problems can ask for the amount of discount, or the final price after discount.
 * 3) When performing mark up, multiply by 1+r% instead of multiplying by r% and then adding on.
 * 4) When performing mark down, multiply by 1-r% instead of multiplying by r% and then subtracting off.