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11 August, 11:56

In a sale normal prices are reduced by 15% the sale price for CD player is £102 work out the normal price of the CD player

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  1. 11 August, 12:02
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    Ok, so the discount is given in a percentage, in this case 15%. The sale price is going to reflect 15% of the original price minus the discount, so ...

    Sale £ = original £ - original £ x. 15

    If we use some algebra, we can reorganize the equation to solve for the original price ...

    Sale $ = original$ - original $ x. 15

    Sale $ = original$ (1 -.15)

    Sale $ = original$ x. 85

    original$ = sale$/.85

    So now we can plug in our values

    original price = 102/.85

    original price = £120
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