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8 November, 00:57

Kate paid $27 for a dress that was on sale at 10% off. What was the original price for this dress?

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  1. 8 November, 03:53
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    The original price for this dress was $30

    Step-by-step explanation:

    If 90% of 30 is 27, we have to find out 10% of 30.

    How to find it:

    1) You make the 10% of 30 into a proportion

    10/100=x/30

    (Cross multiply)

    100x=300

    x=3

    2) So now since we've found 10% of 30, we add it on to 27.

    27+3=30

    Therefore, the original price of the dress that Kate bought was $30.
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