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On every sale she makes, Maria earns a commission. On a computer that she sells for $591, Maria earns a $43 commission. Find the percent commission, rounded to the nearest tenth of a percent.

A 7.3%

Let p represent the commission percentage. Then we can translate the problem statement into words and symbols.
Commission is what percent of sales price
To isolate an unknown value p, divide both sides by 591. Carry the division to four decimal places.
\(\frac{\mathrm{43} }{\mathrm{591}} = \frac{\mathrm{591p} }{\mathrm{591}}\)
\(p \approx 0.0727\)
Because the test digit is greater than or equal to 5, add 1 to the rounding digit, then truncate. Thus, correct to the nearest tenth of a percent, \(p \approx 7.3 \% \)

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