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$12.90 (twelve dollars and ninety cents). To find 10% of a number, just move the decimal point one place to the right. For example, 129 is the same as you change it from 129.000000... to 12.9000000 or just 12.9.

To find 1% of a number, move the decimal point two spaces to the right. For example, 129 ---> 1.29.

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Q: What is 10 percent of 129 dollars?
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