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2. the relationship between two ratios with a rate or ratio that is not constant
4. a negative percent of change
8. a payment for a service it can be a fixed amount a percent of the charge or both
10. an additional amount of money charged on items that people buy
11. the amount by which the regular price of an item is reduced
14. a positive percent of change
15. a payment equal to a percent of the amount of goods or services that an employee sells for the company
19. a constant ratio or unit rate of two variable quantities
20. the amount paid or earned for the use of the principal

1. the amount the customer pays for an item
3. Also known as a tip it is a small amount of money in return for a service
5. the positive difference between the estimate and the actual amount
6. a rate in which the first quantity is compared to 1 unit of the second quantity
7. a ratio that compares the inaccuracy of an estimate to the actual amount
9. the amount the price of an item is increased above the price the store paid for them
12. the relationship between two ratios with constant rate or ratio
13. a ratio that compares the change of in a quantity to the original amount
16. an amount by which regular price of an item is reduced
17. the amount of money deposited or borrowed
18. the amount paid or earned for the use of money