I have some problems with these questions:

3. A hat was priced at $10.80. During a sale, the hat sold for $9.18. What was the rate of discount on the hat?

4. A man's tax on his home is $1,952. The tax rate is $3.20 per $100 of assessed value of the home?
I think I need to times 3.20 and 100, but i don't know whats next.

7. Mr.Leonard bought a shipment of goods for $7250. He paid $3000 in cash and agreed to pay the balance in 9 months with interest at 12 1/2%. What was the total cost of the shipment?

8.A coat was priced at $68.50. At a sale, the coat sold for $54.80. What was the rate of discount on the coat?
I have sometimes have problems with these type of questions, so please help me with this question.

9. A real estate agent collected $4,250 in rents. She gave the owner 3,910 and retained the balance as commission. What was her rate of commission?
Is this how you do it?: 4250-3910= 340
and then i don't know what is the next step.

1 answer

3. Discount=((10.80-9.18)/10.80)*100%=15%.

4. Tax = (3.20/100)*Va = $1952
Solve for Va(assessed value).

7. Loan Amount = 7250-3000 = $4250

Cost = 7250 + 4250*(0.125/12)*9 =

8. Same procedure as #3.

9. Rate = ((4250-3910)/4250)*100% =