After the discount, she will pay for the remaining cost of the jacket. This cost will be equal to the percent remaining after the discount.

100% – 20% = 80%

She will pay for 80% of the original cost.

80% = 0.80

Add in the sales tax.

8% = 0.08

Subtract the final price from Robin's budget of $60.

To find the answer, you must first convert the sales percentage to a decimal by moving the decimal left two places.

Then, multiply the total cost by the decimal.

This gives us the amount of the discount. To find the remaining cost, we subtract that number from the original cost to get the answer.

First, calculate 15% of $45:

Therefore, the discount is $6.75 off of the price of the shirt. To find the sale price, subtract the discount from the original price:

The quickest way to do this problem is to realize that a "mark up" is done by adding that percentage to 100%.  For instance a 40% markup is performed by multiplying by 1.4.  A markdown is done by subtracting that percentage from 100%.  For instance, a 25% markdown is performed by multiplying by 0.75.  (Think of the latter case like this: it is 75% of its original price.)

Based on these remarks, the problem is easy.  While we do not know our price we know that the first markup gives us:

To this, we now perform the mark down:

Multiply out your coefficients (the numbers in the front):

This is the same thing as saying "75% of the original price ()."

If something is discounted , it is really  of its original price.  The question is thus asking, " of what is ?" This can be translated as:

Solve for  by dividing both sides of the equation by :

Therefore, it was originally .

When an item is marked down , it is  of its original price.  The question could be rephrased as " of what is ?"  This could be rewritten as an equation rather simply:

Solve for x by dividing both sides by 0.40:

.

The first step is to find 20% of $170. This can be done easily by multiplying 170 by 0.2, yielding $34. We subtract 34 from 170 to get the initial sale price, $136. Next, we have to take 25% of that already discounted figure, and we do this by multiplying 136 by 0.25. Again, we happen to get $34, and after we subtract that number from 136 we get our final price, $102. The other answer choices are either the result of forgetting a step or of simple calculation errors.

According to his rule, Mr. Jones can spend 12% of $756.00 weekly.

This is the amount he can spend after sales tax.

Let  be the price of the groceries before the sales tax is figured in. 

The sales tax paid is 6.125% of , or , so the amount paid for the groceries is .

Since Mr. Jones is limited to spending $90.72, this means that . We can solve the inequality for .

The maximum amount Mr. Jones can spend before tax is $85.48.

This week, there is a 20% discount on the truck, which means that its price will be 20% lower than its usual price of $20,000. If $20,000 is the regular price, then its sale price must be 80% of $20,000, which is $16,000. Thus, Bob would be saving $4,000 by taking advantage of the discount.

To find the discount, you must simply find 20% of $1200, the television set's original price.

20% of $1200 is $240

Now subtract that number from 1200