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Jamal bought a diamond ring at a 20% discount. He paid $2640 for the ring. Naomi bought a similar ring but was given a discount of $924. What was the percentage discount given to Naomi?

Sagot :

jessmzhou4

Answer: 72%

Step-by-step explanation:

Set Jamal's original ring price = x

[tex]x - x(0.2) = 2640\\x(1-0.2)=2640\\x(0.8)=2640\\x=\frac{2640}{0.8}=3300[/tex]

Jamal's original ring price = $3300

Set Naomi's discount = y

[tex]3300-3300(y)=924\\=3300(1-y)=924\\1-y=\frac{924}{3300} \\-y=\frac{924}{3300} -1\\y=1-\frac{924}{3300}=1-0.28=0.72[/tex]

Naomi's discount is 0.72 = 72%

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