re: Need help with math problem to settle dispute

I would say $425 but only if it's worded exactly like you just said -- sale price. That's (75*100/15)-75 = 425.

If they meant retail price then obviously $500.

What kind of stereo?

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Teacher has her convinced the sale price is $63.75

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Teacher is an absolute dumbass if your OP is really how it's worded.

The way I posted the question in OP is exactly as it was worded on her homework

The teacher is dumber than I thought. She doesn’t understand the phrasing. She messes it up in multiple ways. Doesn’t understand what marked down $75 means. She just takes a 15 percent discount off a $75 product. The fact this woman is teaching children is alarming.

75/.15 = 500

Original price is 500. 500-75 = 425. That's the price it's on sale for. Unless there's something missing in the problem you gave us, you're right.

0.15x = $75

75/0.15 = $500

$500-75 = $425

simple algebra brah

OP, I just googled your question and it came up with many results on the internet.
Here is the answer key:

LINK

It's problem #4.

Answer key says $425.


Email your child's teacher and tell her she is a dumbass.

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A quick google search has given me ammunition. Should I email the teacher?

LINK

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See my post above, I got you one better -- the official answer key