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ANTONII [103]
3 years ago
11

Describe two methods for finding the sale price of an item that is discounted 30%. which method do you prefer? Explain.

Mathematics
2 answers:
Mekhanik [1.2K]3 years ago
6 0
One can take the price of the item before the discount is applied and subtract that from  the percentage off and get the cost of the item. 

I find this is the most effective way. 

another method could be if one turned the percentage into a decimal it could be subtracted from the cost of the item.
mojhsa [17]3 years ago
5 0

Answer:

1. Find the value of the discount amount, and subtract from the original.

2. Find the value of the item after discount by using 100%-30%.

I prefer the second, as it is faster.

Step-by-step explanation:

1. Find the value of the discount amount, and subtract from the original.

Say y is the amount you pay after the discount, and x is the original price, the calculation will look like this:

The value of the discount is 30% of x, which is equal to 0.3x.

subtract that from the original value to find y:

<em>y = x - 0.3x</em>

2. Find the value of the item after discount by using 100%-30%.

The amount left over after subtraction thirty % is 70%

Thus,

<em>y = 0.7 x</em>

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0.5:3*100 =

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Now we have: 0.5 is what percent of 3 = 16.666666666667

Question: 0.5 is what percent of 3?

Percentage solution with steps:

Step 1: We make the assumption that 3 is 100% since it is our output value.

Step 2: We next represent the value we seek with $x$x​.

Step 3: From step 1, it follows that $100\%=3$100%=3​.

Step 4: In the same vein, $x\%=0.5$x%=0.5​.

Step 5: This gives us a pair of simple equations:

$100\%=3(1)$100%=3(1)​.

$x\%=0.5(2)$x%=0.5(2)​.

Step 6: By simply dividing equation 1 by equation 2 and taking note of the fact that both the LHS
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$\frac{100\%}{x\%}=\frac{3}{0.5}$
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Step 7: Taking the inverse (or reciprocal) of both sides yields

$\frac{x\%}{100\%}=\frac{0.5}{3}$
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$\Rightarrow x=16.666666666667\%$⇒x=16.666666666667%​

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