An appliance salesperson earned $32.80 in commission for selling a refrigerator for $820. At that rate, how much would the salesperson earn in commission for selling a microwave oven for $340?

Salesperson would earn $13.6 in commission for selling a microwave oven for $340.  

Step-by-step explanation:

We are given that an appliance salesperson earned $32.80 in commission for selling a refrigerator for $820.

We have to find how much would the salesperson earn in commission for selling a microwave oven for $340.

Firstly, we will the find the rate at which the salesperson gets a commission in % terms.

So, Percentage rate of commission is given by;

Rate of commission=(Commission earned ÷ Selling Price of refrigerator)  100

                                =  =  = 4%

Now, this rate will be used to find the commission earned on selling a microwave oven for $340, i.e;

Commission earned  for selling a microwave oven = 4% of Selling price of microwave oven

                                  =   = $13.6

Therefore, salesperson would earn $13.6 in commission for selling a microwave oven for $340.