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3 years ago

During a sale, a dress decreased in price from $80 to $76. What was the percent of decrease?

Mathematics

2 answers:

Sever21 [200]3 years ago

8 0

Hey!

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This is also known as finding the "percent of change".

Formula: $\frac{New~Value~-~Old~Value}{Old~Value}*100~percent$

~Solve

$\frac{76~-~80}{80} = \frac{-4}{80} = -0.05 * 100~percent = -5~percent$

Change it back to positive.

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Hence, the dress was decreased by 5%

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Hope This Helped! Good Luck!

Tatiana [17]3 years ago

3 0

5 percent is the correct answer

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Answer:

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we can change it into y=mx+b form

$5y=-4x+19$

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we know that slope of two parallel lines are always same

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$m'=-\frac{4}{5}$

Let's assume parallel line passes through (1,1)

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$y-1=-\frac{4}{5}(x-1)$

now, we can solve for y

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we know that slope of perpendicular line is -1/m

so, we get slope as

$m'=\frac{5}{4}$

Let's assume perpendicular line passes through (2,2)

now, we can find equation of line

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we can plug values

$y-2=\frac{5}{4}(x-2)$

now, we can solve for y

$y=\frac{5}{4}x-\frac{1}{2}$

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3 years ago

During a​ sale, a dress decreased in price from ​$80 to ​$76. What was the percent of​ decrease?

During a sale, a dress decreased in price from $80 to $76. What was the percent of decrease?