You forgot to account for the additional cost of spiced meat in a tin.
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… no.
correct answer was given in the 2nd message 4 years ago by dave.
it’s basic % math
a 15% discount on 449,65 gives you 382,2
a 15% discount on 460 gives you 391
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AI says you are obv correct. Stay in school kids! its been decades for me 
To find the original value of an object that was reduced by 15% to a sale price of $391, we can set up the following equation:
Let ( x ) be the original price of the object. A reduction of 15% means the object is sold at 85% of its original price. Thus, we can write:
[ 0.85x = 391 ]
To solve for ( x ), we divide both sides of the equation by 0.85:
[ x = \frac{391}{0.85} ]
Let’s calculate this:
[ x = \frac{391}{0.85} \approx 460 ]
So, the original price of the object was approximately $460.
Calculation Steps:
- Set up the equation: ( 0.85x = 391 ).
- Solve for ( x ) by dividing both sides by 0.85.
- Perform the division: ( \frac{391}{0.85} = 460 ).
Thus, the original price of the object was $460.
Calculating 391×1.15391 \times 1.15391×1.15 would not give you the original price because 391391391 is already the reduced price after a 15% discount. To clarify, here’s why:
- Understanding the Problem:
- The original price was reduced by 15%, resulting in the sale price of $391.
- This means that $391 represents 85% (100% - 15%) of the original price.
- Correct Approach:
- Let xxx be the original price.
- 85% of the original price is equal to $391: 0.85x=3910.85x = 3910.85x=391.
- Solving for the Original Price:
- To find the original price xxx, you need to reverse the reduction. Therefore, you divide the sale price by 0.85 (which represents 85% of the original price).
x=3910.85x = \frac{391}{0.85}x=0.85391
Performing this calculation, you get:
x=3910.85≈460x = \frac{391}{0.85} \approx 460x=0.85391≈460
- Why Multiplying by 1.15 is Incorrect:
- Multiplying 391391391 by 1.151.151.15 would imply increasing the sale price by 15%, which is not the same as finding the original price before the 15% reduction.
- 391×1.15≈449.65391 \times 1.15 \approx 449.65391×1.15≈449.65 would be the price if you increased $391 by 15%, not the original price before it was reduced.
Thus, the correct method is to divide the sale price by 0.85 to find the original price before the discount.
Well, it could have taken 4.7 years to revisit this topic without the discount.
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Use SketchUp. See this file.
Calculation.skp (202.4 KB)
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The correct answer: it depends on the honesty of the store.
thanks chatgpt ?
I mean, it’s only 2 lines.
0,85 x P = 391
therefore
P = 391 / 0,85
BOOM.
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So SketchUp is 2,162mm per 4.7 years without a discount? That doesn’t seem long enough.
It’s funny, or maybe sad, that an adult needs to use AI to solve a simple math problem like this. I learned this when I was 7 or 8 years old.
ok, I’ll say, solving an arithmetic problem using geometry is always classy
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I can only speak for myself but once out of college, any math beyond basic math of addition/subtraction/multiplication and division has essentially gone out the window and near never been used… in now over multiple decades so the mind forgets what isnt important.
Having said that, if i thought about it for more than 10 seconds or it was more important than a forum post, I would have conceptually caught it because it’s a common stock trading trope of
if you lose 50% one day then add 50% the next day - its not the original value (but most at first blush would think it would be) which conceptually is the same thing here.
I wasn’t digging at you. More the general thing.
and yet a direct response to my comment.
Edited because I’m in trouble again.
I did too, The trouble is that I did not use it very much, and over the years I forgot much of the math.