Calculate the Discount: If $48 Equals 30%, What's the Discount on Double the Price?

Percentage Calculations with Price Doubling

All the merchandise in the store is reduced by 30%. If a microwave was discounted by 48 dollars what would be the discount on a product double the price of the microwave?

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Determine the discount on a product whose price is double the micro?
00:08 Establish the price of the micro
00:18 The discount percentage equals 48
00:33 Convert from a percentage to a decimal, and multiply by the micro price
00:54 Isolate the micro price
01:03 Break down into factors and reduce wherever possible
01:12 This is the original price of the micro
01:21 Determine the price of the product that costs double the micro
01:40 This is the product price
01:43 Proceed to calculate a 30% discount
01:52 Convert from a percentage to a decimal, and multiply
01:58 Break down into factors and reduce wherever possible
02:04 This is the solution

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

All the merchandise in the store is reduced by 30%. If a microwave was discounted by 48 dollars what would be the discount on a product double the price of the microwave?

2

Step-by-step solution

To solve this problem, we'll follow these steps:

  • Step 1: Determine the original price of the microwave using its discount value.
  • Step 2: Compute the price of a product double that original price.
  • Step 3: Calculate the discount on this new product price using a 30% rate.

Now, let's work through each step:

Step 1: Given that the discount on the microwave is 48 with a 30% reduction:

\( 48 = \text{{Original Price of Microwave}} \times 0.30

Solving for the Original Price of Microwave:

Original Price of Microwave=480.30=160 dollars \text{{Original Price of Microwave}} = \frac{48}{0.30} = 160 \text{{ dollars}}

Step 2: Calculate the price of a product double the original price:

Price of New Product=2×160=320 dollars \text{{Price of New Product}} = 2 \times 160 = 320 \text{{ dollars}}

Step 3: Calculate the 30% discount on this new product price:

Discount on New Product=320×0.30 \text{{Discount on New Product}} = 320 \times 0.30

=96 dollars = 96 \text{{ dollars}}

Therefore, the discount on a product double the price of the microwave under the same conditions is 96 dollars 96 \text{ dollars} .

3

Final Answer

96 $

Key Points to Remember

Essential concepts to master this topic
  • Rule: Discount = Original Price × Percentage Rate
  • Technique: Find original price first: 48÷0.30=48 ÷ 0.30 = 160
  • Check: Double price discount: 320×0.30=320 × 0.30 = 96 ✓

Common Mistakes

Avoid these frequent errors
  • Doubling the discount instead of the price
    Don't double the 48discounttoget48 discount to get 96! This skips the crucial step of finding the original price first. The discount changes when the price changes. Always find the original price, then double it, then calculate the new discount.

Practice Quiz

Test your knowledge with interactive questions

Calculate 30 over 100 as a percentage:

FAQ

Everything you need to know about this question

Why can't I just double the 48discounttoget48 discount to get 96?

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Great question! While the final answer happens to be $96, doubling the discount is wrong reasoning. You got lucky this time because when you double the price, the discount also doubles. But this won't work for different percentage changes!

How do I find the original price from a discount amount?

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Use the formula: Original Price = Discount Amount ÷ Discount Rate. Here: 480.30=160 \frac{48}{0.30} = 160 dollars. Think of it as working backwards from the discount.

What if the problem asked for triple the price instead?

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Same process! Find the original price (160),thentripleit(160), then triple it (480), then calculate 30% of that: 480×0.30=144 480 \times 0.30 = 144 dollars discount.

Why do we multiply by 0.30 instead of dividing by 30?

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Because 30% means 30 out of 100, which equals 30100=0.30 \frac{30}{100} = 0.30 . Multiplying by 0.30 is the same as finding 30% of a number.

How can I check if my original price calculation is correct?

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Multiply your original price by the discount rate: 160×0.30=48 160 \times 0.30 = 48 . If you get the given discount amount ($48), you're right!

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