# Chapter 7 - Section 7.5 - Percent and Problem Solving: Sales Tax, Commission, and Discount - Exercise Set - Page 513: 42

9%

#### Work Step by Step

commission= commission rate $\times$sales 2304=r$\times$ 25600 divide both sides by 25600 $\frac{2304}{25600}$=$\frac{r\times25600}{25600}$ 0.09=r 9%= r

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