can someone help me solved got it wrong

Question

my answer was 21.00

To assure its customers of low prices, the Home Club offers a "10% Plus" guarantee. If the customer finds the same item selling for less somewhere else, he or she receives the difference in price, plus 10% of the difference. A woman bought miniblinds at the Home Club for $150 but later saw the same blinds on sale for $129 at another store.

(a) How much money can the woman expect to receive if she takes advantage of the "10% Plus" guarantee from the Home Club?

Answer 1

Hi Karen,

Your math is correct, you just need a couple more steps to finish the problem.

The money the woman can get is the difference plus 10% of the difference. Let's call the difference X and the total money the woman can get M.

X is the Home Club price minus the lower price the woman found so:

X = 150 – 129

X = 21

The next step is to find 10% of X. Since a percentage is out of 100, 10% is also 10/100, or 1/10. One tenth of X can also be defined as X divided by 10.

10% of X = X/10

10% of 21 = 21/10

10% of 21 = 2.1

Since we're working in dollars, 2.1 is 2 dollars and 10 cents, or $2.10.

The last step is to add the 10% you just calculated to the difference you found earlier. The difference is $21.00, the 10% is $2.10, so:

M = X + X/10

M = 21.00 + 2.10

M = $23.10

Hope this helps!

Answer 2

The deal is the difference + (10% of the difference)

Step 1: Find the Difference

Home Club: $150   The Sale: $129

The Difference: 150-129 = $21

Step 2: Find 10% of the Difference

10% of 21 is $X?

.10 x 21 = $2.10

10% of the difference is $2.10

So it would be: $21 + $2.10= $23.10

She should expect to receive $23.10

Answer 3

This is a 3 step question.

1st step: Calculate the difference between $150 and $129. 150-129 = 21. $21 is the difference.

2nd step: Find 10% of that difference . 10% of $21 is $2.10

3rd step. Add the difference + the 10%. $21.00 + $2.10 = $23.10