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Question:

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%
Explaination

Let p represent the commission percentage. Then we can translate the problem statement into words and symbols.
Commission is what percent of sales price
43=591p
To isolate an unknown value p, divide both sides by 591. Carry the division to four decimal places.
$2454_w91_h39.png$
$4611_w85_h17.png$
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, $9927_w72_h18.png$