Math CentralQuandaries & Queries


Question from virginia, a student:

If the sale price is $129.99 @ 70% off - what was the original price?

Hi Virginia,

If the sale price is 70% off then $\$129.99$ is 30% of the original price. To write this algebraically let $\$P$ be the original price then

\[ \frac{30}{100} \times P = 129.99.\]

Solve for P.


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