Asweatshirt that was originally priced at $42.50 has been marked down to $34.00. what is the percent decrease? a. 15% b. 20% c. 80% d. 25%

The answer is 20%

I hope this helps :)

 20% decrease

Step-by-step explanation:

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so:

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