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. Wha

Question

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?

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Delwyn 4 years 2021-08-02T08:12:17+00:00 1 Answers 50 views 0

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  1. hongcuc2
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    2021-08-02T08:13:44+00:00
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    Answer: 72%

    Step-by-step explanation:

    Set Jamal’s original ring price = x

    x - x(0.2) = 2640\\x(1-0.2)=2640\\x(0.8)=2640\\x=\frac{2640}{0.8}=3300

    Jamal’s original ring price = $3300

    Set Naomi’s discount = y

    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

    Naomi’s discount is 0.72 = 72%

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