Joel earns a commission of 5% on the audio equipment he sells , and the store keeps the rest . he sells a $750 amplifier. a. how much commission does joel earn from the sale ? b. how much does the store keep ?

Joel earns $35.00 commission and the store keeps $715.

Step-by-step explanation:

You need to figure 5% of what he sold - or 5% of $750.

Of course, you can use a calculator, or multiply $750 by .05. I prefer to think of 10 percent ($75.00) and half that to get 5%. $35.00.

Joel earns $35.00 on the sale. Not bad!

If he gets to keep $35, deduct this from the price to find out how much the store will keep.

$750 - $35 - $715.

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yes. we do proportions in probabilities.