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Find the total weekly earnings for a waitress with a weekly salary of $257 plus a 4% commission on dinners, if the total worth of the dinners she served was $ 4,200.00

Answer :

The waitress earns $425 weekly.

Work:
Use proportions.
x 4
------- = ------
4,200 100

4,200 x 4 = 16800
100 multiply x = 100x
16800 divided by 100 = 168
Commission = $168
Base salary = $257
$168 + $257 = $425

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