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/sci/ - Science & Math

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3423794 No.3423794 [Reply] [Original]

if an item went from $5 to $4, what is the rate of discount?

>> No.3423805
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3423805

>> No.3423807

First of all, kill yourself if this isn't a troll.

Secondly, it's a 20% discount. Enjoy repeating third grade.

>> No.3423823

20% disscount

>> No.3423827

ok think of it like this. we start off with $5. so think of a pie with 5 slices. each slice is 20% of the whole pie. by going down to four dollars, each slice will now be 25% since there are now only four slices. we lost one slice for 5$ so discount rate is 20%.

>> No.3423829

1 dollar

>> No.3423859

>>3423827
can you just multiply $5 by $4 ?

>> No.3423874
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3423874

1 - 4/5 = 1/5

IS THIS MATH CLASS?