Question

I WILL MEDAL AND FAN
The regular price for a surfboard is $150 you have a coupon for 10% off, which is the better buy: 40% off the regular price or 30% off the regular price than 10% off the sale price

Answer 1

do you have an idea?

Answer 2

I think you compare them

Answer 3

well yes, but do you know how to solve these questions

Answer 4

Not really

Answer 5

from the previous questions I had I think you turn the percents into decimals

Answer 6

well how do you find the % off

Answer 7

I'm not really sure

Answer 8

10% off means we first do this.

#1 find out what 10% of 150 is
#2 then take the number we find in 1 and subtract it from 150.

Answer 9

Well What is 150x.4

Answer 10

You can set up a ratio and cross multiply

\[\frac{ x }{ 150 } = \frac{ 10 }{ 100 }\]

Answer 11

I got 60

Answer 12

I'll try cross multiplying too

Answer 13

okay 60-150 is

Answer 14

No, 150 - 60 is...

Answer 15

90

Answer 16

okay that is the first answer

Answer 17

$150 with a 40% discount is $90

Answer 18

yes

Answer 19

Do you know how to do the next step?

Answer 20

i think 150 divided by .3 then the answer divided by .1

Answer 21

NO!!!!!!!!

Answer 22

I got 50

Answer 23

Use the same process you used to take off 40%, but do it twice. First take off 30%, then take off 10%.

Answer 24

okay I got 50 again

Answer 25

no it is not 50

Answer 26

I get a different answer

Answer 27

To take off 40% you did two steps:
0.4 * 150 = 60, this is the 40% discount in dollars
150 - 60 = 90, this is the discounted price

Answer 28

Do the two steps above with 30%.
Then do it again with 10% to the number you get after the 30% discount.

Answer 29

45-150=-105 turn that into 105x.1=__ subtract 105 and you should get your answer

Answer 30

240

Answer 31

where did that come from

Answer 32

105x.1=?

Answer 33

then that number -105

Answer 34

that - is minus not negitive forgot to put the space

Answer 35

negative*

Answer 36

I did .3 x 150 and got 45 than subtracted 150-45 and got 105.
Than I did .1 x 150 and got 15 than subtracted 150 from 15 and got135 than i subtracted both of the numbers

Answer 37

105x.1= x then x-105=answer

Answer 38

139.5

Answer 39

I pointed out above with the 40% discount. It's not 160 - 150, it's 150 - 60 = 90

Answer 40

so is it -139.5 or 139.5

Answer 41

okay now I'm way to confused and this is a simple question

Answer 42

Here it's the same.
0.3 * 150 = 45
150 - 45 = 105

Answer 43

The 30% discount is done and we get 105.
Now we apply the 10% discount,

0.1 * 105 = 10.5
105 = 10.5 = 94.5

Answer 44

so 94.5

Answer 45

90
94.5
yes which is the better deal?

Answer 46

The 40% deal

Answer 47

yes that is your answer

Answer 48

Thank you guys so much

Answer 49

Now we look at all our work:

A single 40% discount on $150 means a final price of $90.

A discount of 30% on $150 followed by a discount of 10% gives a final price of $94.50.

Answer 50

You're welcome.

Answer 51

There is a shortcut you can take when you need to find a discounted price.

The full price of an item is 100% of the price.
100% means the full amount.
If you have a 40% discount on the full price, that means you will only pay 60% of the full price since 100% - 40% = 60%.
Now calculate 60% of the price to find the discounted price.

Let's use the problem above as an example.

1st part: what is $150 discounted 40%?
0.6 * $150 = $90

2nd part: what is $150 discounted 30%?
0.7 * $150 = $150

What is $105 discounted 10%?
0.9 * $105 = $94.50

Notice we get the same discounted prices we got above, $90 and $94.50

Answer 52

lot o steps for a simple problem. No prob happy to help

Answer 53

Thanks I keep this for next time

Answer 54

Great.
You're welcome.

Answer 55

@DogzCatz
Great job, but be careful with 150 - 60 versus 60 - 150.
It makes a big difference.

Answer 56

Sorry confused myself and yeah that is the difference between a negative and a positive number outcome