Sam buys a lamp during the sale. There was a discount of 20%. If the original price is $4, what is the sale price?

Question

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Please put in proportion form!

Answer 1

4/100 = x/80

100x = 320
x = 3.20

or

take .2($4) = $ .80
after discount, cost = $ 4.00 - .80 = $3.20

Answer 2

I need help to these problem its asking the discount of 20% if the orginal price is $4 what is the sale price