$375 + $150 = $525

Sale price is 30% off or (0.3)($525) = $157.50

Subtract the discount from the initial price: $525 – $157.50 = $367.50

Cost of 3 oranges = $1.00

Sales price = $1.00 – (0.20)($1.00) = $0.80

Cost of 6 apples = $2.00 x 2 = $4.00

Sales price = $4.00 – (0.15)($4.00) = $3.40

Total cost = $0.80 + $3.40 = $4.20

This problem requires an understanding of percentages and how to appropriately use them.  The sale takes 25% of off the original price, by multiplying $120 by 0.25 we get $30, so the sale price is $120 – $30 = $90.  We are then told that Karl receives an additional 25% off of the sale price so we multiply $90 by 0.25, we get $22.50, so the price that Karl would pay would be $90 – $22.50 = $67.50.

Since Howard's discount applies only to the original price, the price he would be pay can be determined by multiplying 150 by 0.5, which gives $75, this is the price reduction that Howard recieves, coincidentally it is also the price he will pay after taking $75 off of the original price of $150. Carlita first will recieve the 20% sale discount, her employee discount will then apply to the price of the item after 20% has been taken off of the original price.  The calculations that will provide the price that Carlita will pay are as follows. 150 * 0.2 = 30, 150 – 30 = 120, 120 * 0.3 = 36, 120 – 36 = 84. So Howard will pay $75, and Carlita will pay $84. Carlita will pay more by $9.

The dress is reduced by 60% of the original price, so first we must figure out what 60% of $39.99 is:

0.6*39.99 = 23.99

Since the sale is 60% OFF of the original price, we have to subtract this number from the original price: 

39.99- 23.99= $16. 

Now, we have to reduce this price by an additional 10%, so we have to find 10% of $16:

0.1*16 = 1.60

Finally, we must subtract this from our sale price of $16:

$16-1.6 = $14.40

\(\displaystyle \$ mark\ up = \$ cost \times \%mark\ up=\$75\times 80\% = \$75\times 0.80=\$60\)

\(\displaystyle \$ price = \$ cost + \$ mark\ up= \$75+\$60=\$135\)  

To find the sale price, first find \(\displaystyle 30\)% of $\(\displaystyle 32\):

$\(\displaystyle \$32\cdot 0.30 = \$9.60\)

Subtract this amount from \(\displaystyle \$32\) to find the sale price:

\(\displaystyle \$32-\$9.60 = \$22.40\)

Finally, subtract the \(\displaystyle \$10\) coupon:

\(\displaystyle \$22.40-\$10 = \$12.40\)

There are two ways to do a question like this. The first is to find out what the \(\displaystyle 20\%\) markdown is. We do this by multiplying:

\(\displaystyle 15*0.2\) to get \(\displaystyle 3\)

Then, you subtract this from \(\displaystyle 15\) to get \(\displaystyle 12\).

The other way to solve this is to notice that the total cost of the shirt will be only \(\displaystyle 80\%\) of the original price. Therefore, you can multiply \(\displaystyle 15\) by \(\displaystyle 0.8\) to get \(\displaystyle 12\) as well.

A \(\displaystyle \$140\) book is marked down by \(\displaystyle 25\%\) and then by another \(\displaystyle 10\%\).  What is its final sale cost?

You can do a problem like this two ways. For the first way, you can first multiply:

\(\displaystyle 140*0.25\) to get \(\displaystyle 35\)

Subtracting this from \(\displaystyle 140\), you get a price of \(\displaystyle 105\).

Now, you do the same thing again for the  \(\displaystyle 10\%\):

\(\displaystyle 105*0.1=10.5\)

Subtracting this from \(\displaystyle 105\), you get \(\displaystyle 94.5\).

The easier way to do problems like this is to notice that after the \(\displaystyle 25\%\) discount, the price will be \(\displaystyle 75\%\) of the original. Then, after the \(\displaystyle 10\%\) discount, it will be \(\displaystyle 90\%\) of that altered price. You can just multiply sequentially to get your amount:

\(\displaystyle 140*0.75*0.9=94.5\)

To find how much is remaining after \(\displaystyle 20\%\) is taken off, subtract \(\displaystyle 20\%\) from \(\displaystyle 100\%\) (the total price of the original pair of shoes) and multiply it by the shoe's price.
\(\displaystyle \$72.99*.8=58.392\) which rounds to \(\displaystyle \$58.39\)