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It can be helpful to first calculate 10% off by simply moving the decimal over one point. Then you can either multiply that by 4 or double it twice to calculate the amount off. To find the new sale price, take the original price and subtract the discount.

For example, 40% off a $24.00 item can be calculated as follows:

10% off: $2.40

Multiply by 4: $9.60

Subtract from original price: $14.40

So the discount is $9.60 and the final price is $14.40.

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Q: How do you find 40 percent discount off a price?
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